User:Timothy2b/sandbox GSC United States - Northeast

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Maine[edit]

Portland - Humid continental (Dfb)[edit]

Portland, Maine
Climate chart (explanation)
J
F
M
A
M
J
J
A
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O
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89
 
 
−5
−14
 
 
90
 
 
−3
−13
 
 
104
 
 
3
−6
 
 
112
 
 
11
1
 
 
93
 
 
18
8
 
 
105
 
 
23
13
 
 
87
 
 
26
16
 
 
91
 
 
26
15
 
 
96
 
 
22
11
 
 
133
 
 
14
4
 
 
108
 
 
6
−3
 
 
114
 
 
−2
−10
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[1]
Imperial conversion
JFMAMJJASOND
 
 
3.5
 
 
23
7
 
 
3.5
 
 
26
8
 
 
4.1
 
 
37
21
 
 
4.4
 
 
52
34
 
 
3.7
 
 
64
46
 
 
4.1
 
 
74
55
 
 
3.4
 
 
80
61
 
 
3.6
 
 
79
60
 
 
3.8
 
 
71
52
 
 
5.2
 
 
58
39
 
 
4.3
 
 
43
26
 
 
4.5
 
 
29
13
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Portland International Jetport, Maine (1991–2020 normals, extremes 1871-present)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 57
(14) 		59
(15) 		82
(28) 		90
(32) 		97
(36) 		99
(37) 		102
(39) 		102
(39) 		97
(36) 		86
(30) 		70
(21) 		63
(17) 		102
(39)
Mean maximum °F (°C) 42.8
(6.0) 		42.4
(5.8) 		55.8
(13.2) 		72.7
(22.6) 		85.5
(29.7) 		89.2
(31.8) 		91.6
(33.1) 		90.0
(32.2) 		86.5
(30.3) 		73.6
(23.1) 		60.1
(15.6) 		46.6
(8.1) 		93.6
(34.2)
Mean daily maximum °F (°C) 23.4
(−4.8) 		26.1
(−3.3) 		36.9
(2.7) 		52.0
(11.1) 		64.2
(17.9) 		73.6
(23.1) 		79.5
(26.4) 		78.6
(25.9) 		71.1
(21.7) 		57.7
(14.3) 		43.0
(6.1) 		29.3
(−1.5) 		53.0
(11.6)
Daily mean °F (°C) 15.1
(−9.4) 		17.2
(−8.2) 		28.8
(−1.8) 		42.8
(6.0) 		54.9
(12.7) 		64.2
(17.9) 		70.3
(21.3) 		69.3
(20.7) 		61.5
(16.4) 		48.6
(9.2) 		34.5
(1.4) 		21.4
(−5.9) 		44.1
(6.7)
Mean daily minimum °F (°C) 6.6
(−14.1) 		8.2
(−13.2) 		20.7
(−6.3) 		33.6
(0.9) 		45.5
(7.5) 		55.0
(12.8) 		61.2
(16.2) 		59.7
(15.4) 		52.2
(11.2) 		39.2
(4.0) 		26.2
(−3.2) 		13.5
(−10.3) 		35.1
(1.7)
Mean minimum °F (°C) −15.2
(−26.2) 		−11.2
(−24.0) 		1.0
(−17.2) 		21.9
(−5.6) 		33.1
(0.6) 		43.3
(6.3) 		51.6
(10.9) 		48.6
(9.2) 		37.0
(2.8) 		24.6
(−4.1) 		10.6
(−11.9) 		−5.1
(−20.6) 		−18.0
(−27.8)
Record low °F (°C) −35
(−37) 		−47
(−44) 		−26
(−32) 		7
(−14) 		23
(−5) 		34
(1) 		39
(4) 		34
(1) 		23
(−5) 		14
(−10) 		−11
(−24) 		−29
(−34) 		−47
(−44)
Average precipitation inches (mm) 3.5
(89) 		3.5
(90) 		4.1
(104) 		4.4
(112) 		3.7
(93) 		4.1
(105) 		3.4
(87) 		3.6
(91) 		3.8
(96) 		5.2
(133) 		4.3
(108) 		4.5
(114) 		48.1
(1,222)
Average snowfall inches (cm) 34
(87) 		32
(82) 		22
(55) 		3.5
(9) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.4
(1) 		14
(36) 		34
(87) 		139.9
(357)
Average extreme snow depth inches (cm) 19
(49) 		27
(68) 		25
(64) 		3.1
(8) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0.4
(1) 		4.7
(12) 		11
(28) 		28
(70)
Average precipitation days (≥ 0.2 mm) 11.2 10.2 11.3 11.1 12.5 11.7 10.8 9.4 9.3 10.9 10.7 12.3 131.4
Average snowy days (≥ 0.2 cm) 10.6 9.0 7.1 2.3 0.0 0.0 0.0 0.0 0.0 0.3 3.5 10.0 42.8
Average relative humidity (%) 66.8 65.2 66.3 66.8 71.1 74.7 75.3 76.3 76.7 73.9 72.6 70.2 71.3
Mean monthly sunshine hours 164.8 172.8 205.2 213.5 243.2 259.1 282.2 267.6 229.1 195.7 138.7 140.9 2,512.8
Percent possible sunshine 57 59 55 53 53 56 60 62 61 57 48 51 56
Average ultraviolet index 1 2 3 5 7 8 8 7 5 3 2 1 4
[citation needed]

Massachusetts[edit]

Pittsfield - Humid continental (Dfb)[edit]

Pittsfield
Climate chart (explanation)
J
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M
A
M
J
J
A
S
O
N
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68
 
 
−6
−15
 
 
64
 
 
−4
−14
 
 
78
 
 
2
−8
 
 
86
 
 
12
0
 
 
96
 
 
19
7
 
 
116
 
 
24
12
 
 
106
 
 
26
14
 
 
97
 
 
25
14
 
 
114
 
 
21
9
 
 
116
 
 
14
3
 
 
89
 
 
5
−5
 
 
92
 
 
−3
−11
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[2]
Imperial conversion
JFMAMJJASOND
 
 
2.7
 
 
21
5
 
 
2.5
 
 
24
6
 
 
3.1
 
 
36
18
 
 
3.4
 
 
53
32
 
 
3.8
 
 
67
44
 
 
4.6
 
 
75
53
 
 
4.2
 
 
79
58
 
 
3.8
 
 
78
56
 
 
4.5
 
 
70
49
 
 
4.6
 
 
56
37
 
 
3.5
 
 
41
24
 
 
3.6
 
 
26
12
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Pittsfield Municipal Airport, MA, 1991–2020 normals, extremes 1925–present
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 55
(13) 		64
(18) 		75
(24) 		90
(32) 		93
(34) 		100
(38) 		100
(38) 		100
(38) 		95
(35) 		82
(28) 		73
(23) 		57
(14) 		100
(38)
Mean daily maximum °F (°C) 21.0
(−6.1) 		24.1
(−4.4) 		36.3
(2.4) 		53.4
(11.9) 		66.9
(19.4) 		74.7
(23.7) 		79.3
(26.3) 		77.5
(25.3) 		70.3
(21.3) 		56.5
(13.6) 		41.2
(5.1) 		26.4
(−3.1) 		52.3
(11.3)
Mean daily minimum °F (°C) 4.8
(−15.1) 		6.1
(−14.4) 		17.8
(−7.9) 		32.0
(0.0) 		44.4
(6.9) 		53.1
(11.7) 		57.9
(14.4) 		56.5
(13.6) 		48.9
(9.4) 		36.7
(2.6) 		23.7
(−4.6) 		11.8
(−11.2) 		32.8
(0.5)
Record low °F (°C) −31
(−35) 		−35
(−37) 		−15
(−26) 		9
(−13) 		25
(−4) 		30
(−1) 		39
(4) 		32
(0) 		23
(−5) 		12
(−11) 		−6
(−21) 		−33
(−36) 		−35
(−37)
Average precipitation inches (mm) 2.7
(68) 		2.5
(64) 		3.1
(78) 		3.4
(86) 		3.8
(96) 		4.6
(116) 		4.2
(106) 		3.8
(97) 		4.5
(114) 		4.6
(116) 		3.5
(89) 		3.6
(92) 		44.3
(1,122)
Average snowfall inches (cm) 28
(71) 		26
(67) 		20
(50) 		4.7
(12) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		2.0
(5) 		9.8
(25) 		33
(85) 		123.5
(315)
Average precipitation days (≥ .2 mm) 12 12 13 14 14 15 15 15 13 14 12 13 162
Source: Western Regional Climate Center[3]

Boston - Humid continental (Dfa)[edit]

Boston
Climate chart (explanation)
J
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M
A
M
J
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A
S
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86
 
 
−2
−10
 
 
82
 
 
−1
−9
 
 
106
 
 
5
−4
 
 
92
 
 
13
4
 
 
83
 
 
19
10
 
 
99
 
 
25
15
 
 
83
 
 
28
19
 
 
82
 
 
27
18
 
 
90
 
 
23
15
 
 
102
 
 
16
8
 
 
93
 
 
8
0
 
 
109
 
 
1
−7
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[4]
Imperial conversion
JFMAMJJASOND
 
 
3.4
 
 
28
14
 
 
3.2
 
 
30
16
 
 
4.2
 
 
40
26
 
 
3.6
 
 
55
39
 
 
3.3
 
 
67
50
 
 
3.9
 
 
76
60
 
 
3.3
 
 
82
66
 
 
3.2
 
 
80
65
 
 
3.5
 
 
73
58
 
 
4
 
 
60
46
 
 
3.7
 
 
46
33
 
 
4.3
 
 
33
20
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Boston, Massachusetts (Logan Airport), 1991−2020 normals,[a] extremes 1872−present[b]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 64
(18) 		64
(18) 		84
(29) 		91
(33) 		97
(36) 		100
(38) 		104
(40) 		102
(39) 		102
(39) 		88
(31) 		77
(25) 		66
(19) 		104
(40)
Mean maximum °F (°C) 49.3
(9.6) 		48.9
(9.4) 		61.5
(16.4) 		78.1
(25.6) 		88.2
(31.2) 		92.1
(33.4) 		95.0
(35.0) 		93.7
(34.3) 		88.9
(31.6) 		77.7
(25.4) 		64.8
(18.2) 		52.2
(11.2) 		96.4
(35.8)
Mean daily maximum °F (°C) 27.9
(−2.3) 		30.0
(−1.1) 		40.1
(4.5) 		54.7
(12.6) 		66.6
(19.2) 		76.3
(24.6) 		82.0
(27.8) 		80.4
(26.9) 		73.0
(22.8) 		60.3
(15.7) 		46.2
(7.9) 		33.3
(0.7) 		55.9
(13.3)
Daily mean °F (°C) 20.8
(−6.2) 		22.8
(−5.1) 		32.9
(0.5) 		46.8
(8.2) 		58.5
(14.7) 		68.0
(20.0) 		74.1
(23.4) 		72.7
(22.6) 		65.7
(18.7) 		53.1
(11.7) 		39.4
(4.1) 		26.8
(−2.9) 		48.5
(9.1)
Mean daily minimum °F (°C) 14.2
(−9.9) 		15.6
(−9.1) 		25.7
(−3.5) 		39.0
(3.9) 		50.4
(10.2) 		59.7
(15.4) 		66.0
(18.9) 		65.1
(18.4) 		58.8
(14.9) 		45.7
(7.6) 		32.5
(0.3) 		20.1
(−6.6) 		41.1
(5.0)
Mean minimum °F (°C) −4.2
(−20.1) 		−0.8
(−18.2) 		10.2
(−12.1) 		29.1
(−1.6) 		41.2
(5.1) 		49.6
(9.8) 		58.6
(14.8) 		57.7
(14.3) 		46.8
(8.2) 		33.3
(0.7) 		19.0
(−7.2) 		4.1
(−15.5) 		−6.3
(−21.3)
Record low °F (°C) −22
(−30) 		−27
(−33) 		−13
(−25) 		9
(−13) 		30
(−1) 		41
(5) 		50
(10) 		46
(8) 		34
(1) 		23
(−5) 		−8
(−22) 		−26
(−32) 		−27
(−33)
Average precipitation inches (mm) 3.4
(86) 		3.2
(82) 		4.2
(106) 		3.6
(92) 		3.3
(83) 		3.9
(99) 		3.3
(83) 		3.2
(82) 		3.5
(90) 		4.0
(102) 		3.7
(93) 		4.3
(109) 		43.6
(1,107)
Average snowfall inches (cm) 30
(76) 		26
(67) 		13
(33) 		2.0
(5.1) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.3
(0.7) 		6.7
(17) 		29
(73) 		107
(271.8)
Average precipitation days (≥ 0.2 mm) 11.8 10.6 11.6 11.6 11.8 10.9 9.4 9.0 9.0 10.5 10.3 11.9 128.4
Average snowy days (≥ 0.2 cm) 10.1 8.8 5.4 1.1 0.0 0.0 0.0 0.0 0.0 0.4 1.6 7.2 34.6
Average relative humidity (%) 62.3 62.0 63.1 63.0 66.7 68.5 68.4 70.8 71.8 68.5 67.5 65.4 66.5
Average dew point °F (°C) 7.5
(−13.6) 		8.6
(−13.0) 		19.8
(−6.8) 		31.8
(−0.1) 		45.0
(7.2) 		55.2
(12.9) 		61.0
(16.1) 		60.4
(15.8) 		53.8
(12.1) 		41.0
(5.0) 		28.0
(−2.2) 		13.1
(−10.5) 		35.4
(1.9)
Mean monthly sunshine hours 163.4 168.4 213.7 227.2 267.3 286.5 300.9 277.3 237.1 206.3 143.2 142.3 2,633.6
Percent possible sunshine 56 57 58 57 59 63 65 64 63 60 49 50 59
Average ultraviolet index 1 2 4 5 7 8 8 8 6 4 2 1 5
Source 1: NOAA (relative humidity, dew point and sun 1961−1990)[4][6][7]
Source 2: Weather Atlas (UV)[8]

Nantucket - Humid continental climate (Dfb)[edit]

Nantucket
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
81
 
 
−1
−8
 
 
72
 
 
−1
−8
 
 
98
 
 
4
−3
 
 
91
 
 
10
3
 
 
76
 
 
16
8
 
 
76
 
 
20
13
 
 
69
 
 
24
17
 
 
76
 
 
24
17
 
 
91
 
 
21
14
 
 
112
 
 
16
8
 
 
96
 
 
9
1
 
 
100
 
 
2
−5
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[9]
Imperial conversion
JFMAMJJASOND
 
 
3.2
 
 
31
18
 
 
2.8
 
 
31
18
 
 
3.9
 
 
39
26
 
 
3.6
 
 
50
37
 
 
3
 
 
61
47
 
 
3
 
 
69
56
 
 
2.7
 
 
75
63
 
 
3
 
 
76
62
 
 
3.6
 
 
70
57
 
 
4.4
 
 
60
47
 
 
3.8
 
 
47
35
 
 
3.9
 
 
36
23
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Nantucket, Massachusetts (Nantucket Memorial Airport) 1991–2020 normals, extremes 1948–present
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 54
(12) 		52
(11) 		61
(16) 		81
(27) 		84
(29) 		91
(33) 		91
(33) 		100
(38) 		86
(30) 		81
(27) 		68
(20) 		54
(12) 		100
(38)
Mean maximum °F (°C) 44.2
(6.8) 		41.7
(5.4) 		51.4
(10.8) 		64.6
(18.1) 		75.4
(24.1) 		81.1
(27.3) 		84.0
(28.9) 		83.5
(28.6) 		78.6
(25.9) 		71.1
(21.7) 		58.5
(14.7) 		48.9
(9.4) 		86.4
(30.2)
Mean daily maximum °F (°C) 30.6
(−0.8) 		31.1
(−0.5) 		38.8
(3.8) 		50.4
(10.2) 		60.6
(15.9) 		68.7
(20.4) 		75.4
(24.1) 		75.7
(24.3) 		70.3
(21.3) 		60.1
(15.6) 		47.5
(8.6) 		36.1
(2.3) 		53.8
(12.1)
Daily mean °F (°C) 24.1
(−4.4) 		24.4
(−4.2) 		32.5
(0.3) 		43.7
(6.5) 		53.8
(12.1) 		62.2
(16.8) 		69.1
(20.6) 		69.1
(20.6) 		63.7
(17.6) 		53.4
(11.9) 		41.0
(5.0) 		29.7
(−1.3) 		47.2
(8.5)
Mean daily minimum °F (°C) 17.6
(−8.0) 		18.0
(−7.8) 		26.1
(−3.3) 		37.0
(2.8) 		46.9
(8.3) 		55.8
(13.2) 		62.6
(17.0) 		62.4
(16.9) 		57.0
(13.9) 		46.8
(8.2) 		34.5
(1.4) 		23.2
(−4.9) 		40.7
(4.8)
Mean minimum °F (°C) 1.0
(−17.2) 		4.6
(−15.2) 		12.4
(−10.9) 		27.0
(−2.8) 		35.8
(2.1) 		46.6
(8.1) 		54.1
(12.3) 		52.5
(11.4) 		44.6
(7.0) 		33.1
(0.6) 		21.0
(−6.1) 		9.0
(−12.8) 		−0.8
(−18.2)
Record low °F (°C) −11
(−24) 		−11
(−24) 		1
(−17) 		18
(−8) 		28
(−2) 		36
(2) 		46
(8) 		39
(4) 		34
(1) 		19
(−7) 		10
(−12) 		−11
(−24) 		−11
(−24)
Average precipitation inches (mm) 3.2
(81) 		2.8
(72) 		3.9
(98) 		3.6
(91) 		3.0
(76) 		3.0
(76) 		2.7
(69) 		3.0
(76) 		3.6
(91) 		4.4
(112) 		3.8
(96) 		3.9
(100) 		40.9
(1,038)
Average snowfall inches (cm) 24
(62) 		23
(58) 		15
(38) 		3.1
(8) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.1
(0.2) 		6.7
(17) 		19
(49) 		90.9
(232.2)
Average extreme snow depth inches (cm) 10
(26) 		13
(32) 		9.8
(25) 		1.2
(3) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		3.1
(8) 		5.9
(15) 		13
(34)
Average precipitation days (≥ 0.1 mm) 11.6 10.2 10.5 11.9 11.7 11.6 11.9 13.1 12.5 13.1 10.9 12.4 141.4
Average snowy days (≥ 0.1 cm) 8.8 7.0 4.7 1.7 0.0 0.0 0.0 0.0 0.0 0.0 2.3 6.5 31
Source: NOAA (snow/snow days/snow depth 1948–1973)[10][11]

Rhode Island[edit]

Providence - Humid continental (Dfa)[edit]

Providence
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
101
 
 
−2
−11
 
 
87
 
 
0
−10
 
 
124
 
 
6
−4
 
 
109
 
 
14
3
 
 
86
 
 
21
10
 
 
97
 
 
25
15
 
 
74
 
 
29
18
 
 
91
 
 
28
18
 
 
106
 
 
24
14
 
 
106
 
 
17
6
 
 
108
 
 
9
−1
 
 
118
 
 
1
−7
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[12]
Imperial conversion
JFMAMJJASOND
 
 
4
 
 
29
13
 
 
3.4
 
 
31
15
 
 
4.9
 
 
42
25
 
 
4.3
 
 
57
38
 
 
3.4
 
 
69
49
 
 
3.8
 
 
78
59
 
 
2.9
 
 
84
65
 
 
3.6
 
 
82
64
 
 
4.2
 
 
75
56
 
 
4.2
 
 
62
43
 
 
4.3
 
 
48
30
 
 
4.6
 
 
34
19
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Providence, Rhode Island (T. F. Green Airport), 1991–2020 normals, extremes 1904-present
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 61
(16) 		63
(17) 		84
(29) 		97
(36) 		97
(36) 		99
(37) 		102
(39) 		104
(40) 		100
(38) 		86
(30) 		75
(24) 		68
(20) 		104
(40)
Mean maximum °F (°C) 49.6
(9.8) 		48.9
(9.4) 		61.7
(16.5) 		77.5
(25.3) 		87.3
(30.7) 		91.6
(33.1) 		94.8
(34.9) 		93.6
(34.2) 		87.6
(30.9) 		77.2
(25.1) 		64.8
(18.2) 		52.5
(11.4) 		96.6
(35.9)
Mean daily maximum °F (°C) 29.3
(−1.5) 		31.5
(−0.3) 		42.3
(5.7) 		57.0
(13.9) 		68.9
(20.5) 		77.7
(25.4) 		83.7
(28.7) 		82.2
(27.9) 		74.8
(23.8) 		62.1
(16.7) 		47.8
(8.8) 		34.3
(1.3) 		57.6
(14.2)
Daily mean °F (°C) 21.2
(−6.0) 		23.0
(−5.0) 		33.4
(0.8) 		47.5
(8.6) 		59.2
(15.1) 		68.2
(20.1) 		74.5
(23.6) 		73.0
(22.8) 		65.7
(18.7) 		52.5
(11.4) 		39.0
(3.9) 		26.4
(−3.1) 		48.6
(9.2)
Mean daily minimum °F (°C) 13.1
(−10.5) 		14.5
(−9.7) 		24.8
(−4.0) 		37.8
(3.2) 		49.3
(9.6) 		58.8
(14.9) 		65.1
(18.4) 		63.9
(17.7) 		56.5
(13.6) 		43.3
(6.3) 		30.4
(−0.9) 		18.7
(−7.4) 		39.7
(4.3)
Mean minimum °F (°C) −4.9
(−20.5) 		−1.7
(−18.7) 		9.7
(−12.4) 		26.8
(−2.9) 		38.1
(3.4) 		47.1
(8.4) 		56.1
(13.4) 		54.3
(12.4) 		43.2
(6.2) 		29.8
(−1.2) 		16.3
(−8.7) 		3.4
(−15.9) 		−7.1
(−21.7)
Record low °F (°C) −22
(−30) 		−26
(−32) 		−4
(−20) 		9
(−13) 		28
(−2) 		39
(4) 		48
(9) 		39
(4) 		32
(0) 		18
(−8) 		1
(−17) 		−20
(−29) 		−26
(−32)
Average precipitation inches (mm) 4.0
(101) 		3.4
(87) 		4.9
(124) 		4.3
(109) 		3.4
(86) 		3.8
(97) 		2.9
(74) 		3.6
(91) 		4.2
(106) 		4.2
(106) 		4.3
(108) 		4.6
(118) 		47.6
(1,207)
Average snowfall inches (cm) 34
(86) 		26
(67) 		18
(46) 		1.6
(4) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.4
(1) 		3.5
(9) 		31
(79) 		114.5
(292)
Average extreme snow depth inches (cm) 10
(26) 		12
(31) 		9.4
(24) 		0.8
(2) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		1.2
(3) 		6.3
(16) 		15
(38)
Average precipitation days (≥ 0.2 mm) 11.2 10.3 11.6 11.7 12.2 10.8 9.3 9.1 9.1 10.2 9.6 11.9 127
Average snowy days (≥ 0.2 cm) 8.7 7.4 5.7 0.7 0.0 0.0 0.0 0.0 0.0 0.2 2.6 7.4 32.7
Average relative humidity (%) 63.9 63.0 62.9 61.4 66.6 70.1 71.0 72.5 73.0 70.2 68.9 67.0 67.5
Average dew point °F (°C) 7.3
(−13.7) 		8.4
(−13.1) 		19.6
(−6.9) 		31.3
(−0.4) 		45.0
(7.2) 		55.6
(13.1) 		61.5
(16.4) 		61.0
(16.1) 		53.8
(12.1) 		40.8
(4.9) 		27.9
(−2.3) 		13.1
(−10.5) 		35.4
(1.9)
Mean monthly sunshine hours 171.7 172.6 215.6 225.1 254.9 274.1 290.6 262.8 233.0 208.7 148.0 148.6 2,605.7
Percent possible sunshine 58 58 58 56 57 60 63 61 62 61 50 52 58
Average ultraviolet index 1 2 4 6 7 8 8 8 6 4 2 1 5
[citation needed]

Connecticut[edit]

Hartford - Humid continental (Dfa)[edit]

Hartford
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
83
 
 
−3
−12
 
 
80
 
 
−1
−11
 
 
97
 
 
6
−5
 
 
99
 
 
15
3
 
 
96
 
 
22
9
 
 
109
 
 
27
14
 
 
106
 
 
30
17
 
 
107
 
 
29
17
 
 
112
 
 
24
12
 
 
115
 
 
17
5
 
 
89
 
 
8
−2
 
 
104
 
 
0
−9
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[13]
Imperial conversion
JFMAMJJASOND
 
 
3.3
 
 
27
10
 
 
3.1
 
 
29
12
 
 
3.8
 
 
42
23
 
 
3.9
 
 
59
37
 
 
3.8
 
 
72
48
 
 
4.3
 
 
80
58
 
 
4.2
 
 
85
63
 
 
4.2
 
 
83
62
 
 
4.4
 
 
76
54
 
 
4.5
 
 
62
41
 
 
3.5
 
 
46
28
 
 
4.1
 
 
32
16
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Bradley International Airport, Connecticut (1991–2020 normals, extremes 1905-present)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 63
(17) 		68
(20) 		84
(29) 		95
(35) 		99
(37) 		100
(38) 		102
(39) 		102
(39) 		100
(38) 		90
(32) 		77
(25) 		66
(19) 		102
(39)
Mean maximum °F (°C) 48.0
(8.9) 		48.7
(9.3) 		62.8
(17.1) 		80.4
(26.9) 		90.3
(32.4) 		93.2
(34.0) 		95.9
(35.5) 		94.3
(34.6) 		89.6
(32.0) 		78.4
(25.8) 		65.1
(18.4) 		51.1
(10.6) 		97.7
(36.5)
Mean daily maximum °F (°C) 26.8
(−2.9) 		29.5
(−1.4) 		41.9
(5.5) 		58.6
(14.8) 		71.8
(22.1) 		79.9
(26.6) 		85.3
(29.6) 		83.3
(28.5) 		75.7
(24.3) 		61.7
(16.5) 		46.0
(7.8) 		31.6
(−0.2) 		57.7
(14.3)
Daily mean °F (°C) 18.1
(−7.7) 		20.7
(−6.3) 		32.4
(0.2) 		47.7
(8.7) 		60.1
(15.6) 		68.9
(20.5) 		74.3
(23.5) 		72.5
(22.5) 		64.8
(18.2) 		51.3
(10.7) 		36.9
(2.7) 		23.5
(−4.7) 		47.6
(8.7)
Mean daily minimum °F (°C) 9.9
(−12.3) 		11.7
(−11.3) 		22.8
(−5.1) 		36.7
(2.6) 		48.4
(9.1) 		57.7
(14.3) 		63.3
(17.4) 		61.7
(16.5) 		53.8
(12.1) 		40.6
(4.8) 		27.7
(−2.4) 		15.6
(−9.1) 		37.5
(3.0)
Mean minimum °F (°C) −9.9
(−23.3) 		−7.1
(−21.7) 		6.1
(−14.4) 		24.4
(−4.2) 		34.7
(1.5) 		45.0
(7.2) 		53.1
(11.7) 		50.2
(10.1) 		38.5
(3.6) 		25.9
(−3.4) 		12.4
(−10.9) 		−1.3
(−18.5) 		−12.5
(−24.7)
Record low °F (°C) −35
(−37) 		−33
(−36) 		−11
(−24) 		7
(−14) 		28
(−2) 		37
(3) 		45
(7) 		36
(2) 		30
(−1) 		16
(−9) 		−4
(−20) 		−27
(−33) 		−35
(−37)
Average precipitation inches (mm) 3.3
(83) 		3.1
(80) 		3.8
(97) 		3.9
(99) 		3.8
(96) 		4.3
(109) 		4.2
(106) 		4.2
(107) 		4.4
(112) 		4.5
(115) 		3.5
(89) 		4.1
(104) 		47.1
(1,197)
Average snowfall inches (cm) 28
(70) 		27
(68) 		17
(44) 		1.6
(4) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.8
(2) 		4.7
(12) 		30
(76) 		109.1
(276)
Average extreme snow depth inches (cm) 15
(38) 		18
(46) 		15
(37) 		0.8
(2) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		2.0
(5) 		8.3
(21) 		20
(51)
Average precipitation days (≥ 0.2 mm) 10.9 10.5 11.2 11.5 12.3 11.8 10.7 10.4 9.2 10.5 9.9 11.5 130.4
Average snowy days (≥ 0.2 cm) 9.1 8.2 4.8 0.9 0.0 0.0 0.0 0.0 0.0 0.2 2.9 8.0 34.1
Average relative humidity (%) 63.9 63.0 60.4 58.0 63.0 67.3 68.0 70.6 72.9 69.2 68.3 68.0 66.1
Average dew point °F (°C) 4.6
(−15.2) 		6.8
(−14.0) 		18.0
(−7.8) 		30.6
(−0.8) 		45.0
(7.2) 		55.6
(13.1) 		61.0
(16.1) 		60.1
(15.6) 		53.1
(11.7) 		39.0
(3.9) 		25.9
(−3.4) 		10.8
(−11.8) 		34.2
(1.2)
Mean monthly sunshine hours 169.8 176.1 213.9 228.2 258.6 273.4 293.1 269.6 223.6 199.4 139.4 139.5 2,584.6
Percent possible sunshine 58 59 58 57 57 60 64 63 60 58 47 49 58
Average ultraviolet index 1 2 4 6 7 8 8 8 6 4 2 1 5
[citation needed]

New York[edit]

Albany - Humid continental (Dfa)[edit]

Albany
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
66
 
 
−5
−14
 
 
58
 
 
−3
−13
 
 
78
 
 
4
−6
 
 
79
 
 
14
2
 
 
87
 
 
22
9
 
 
103
 
 
26
14
 
 
116
 
 
29
17
 
 
96
 
 
28
16
 
 
95
 
 
24
11
 
 
98
 
 
15
4
 
 
76
 
 
7
−3
 
 
83
 
 
−2
−10
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[14]
Imperial conversion
JFMAMJJASOND
 
 
2.6
 
 
24
7
 
 
2.3
 
 
27
9
 
 
3.1
 
 
40
21
 
 
3.1
 
 
57
35
 
 
3.4
 
 
71
48
 
 
4.1
 
 
79
57
 
 
4.6
 
 
84
62
 
 
3.8
 
 
82
61
 
 
3.7
 
 
74
53
 
 
3.9
 
 
60
39
 
 
3
 
 
44
26
 
 
3.3
 
 
29
14
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Albany International Airport, New York (1991–2020 normals,[c] extremes 1874–present[d])
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 63
(17) 		64
(18) 		84
(29) 		91
(33) 		97
(36) 		100
(38) 		104
(40) 		102
(39) 		100
(38) 		90
(32) 		77
(25) 		63
(17) 		104
(40)
Mean maximum °F (°C) 45.5
(7.5) 		45.5
(7.5) 		60.4
(15.8) 		79.2
(26.2) 		87.8
(31.0) 		91.9
(33.3) 		92.7
(33.7) 		90.7
(32.6) 		87.1
(30.6) 		75.9
(24.4) 		62.2
(16.8) 		47.5
(8.6) 		94.5
(34.7)
Mean daily maximum °F (°C) 23.7
(−4.6) 		27.0
(−2.8) 		39.9
(4.4) 		57.4
(14.1) 		71.2
(21.8) 		79.3
(26.3) 		83.8
(28.8) 		82.0
(27.8) 		74.5
(23.6) 		59.7
(15.4) 		43.9
(6.6) 		29.1
(−1.6) 		56.0
(13.3)
Daily mean °F (°C) 15.4
(−9.2) 		17.8
(−7.9) 		30.4
(−0.9) 		46.2
(7.9) 		59.5
(15.3) 		68.4
(20.2) 		73.0
(22.8) 		71.4
(21.9) 		63.5
(17.5) 		49.6
(9.8) 		35.1
(1.7) 		21.4
(−5.9) 		46.0
(7.8)
Mean daily minimum °F (°C) 7.0
(−13.9) 		8.6
(−13.0) 		20.7
(−6.3) 		35.1
(1.7) 		48.0
(8.9) 		57.4
(14.1) 		62.4
(16.9) 		60.6
(15.9) 		52.5
(11.4) 		39.4
(4.1) 		26.2
(−3.2) 		13.6
(−10.2) 		36.0
(2.2)
Mean minimum °F (°C) −15.0
(−26.1) 		−11.4
(−24.1) 		2.5
(−16.4) 		21.9
(−5.6) 		33.8
(1.0) 		43.3
(6.3) 		51.4
(10.8) 		48.9
(9.4) 		37.6
(3.1) 		25.2
(−3.8) 		10.6
(−11.9) 		−4.4
(−20.2) 		−17.3
(−27.4)
Record low °F (°C) −36
(−38) 		−31
(−35) 		−26
(−32) 		7
(−14) 		27
(−3) 		36
(2) 		39
(4) 		34
(1) 		25
(−4) 		14
(−10) 		−17
(−27) 		−31
(−35) 		−36
(−38)
Average precipitation inches (mm) 2.6
(66) 		2.3
(58) 		3.1
(78) 		3.1
(79) 		3.4
(87) 		4.1
(103) 		4.6
(116) 		3.8
(96) 		3.7
(95) 		3.9
(98) 		3.0
(76) 		3.3
(83) 		40.9
(1,035)
Average snowfall inches (cm) 30
(76) 		23
(59) 		16
(40) 		2.4
(6) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.4
(1) 		9.4
(24) 		29
(74) 		110.2
(280)
Average precipitation days (≥ 0.2 mm) 12.7 10.6 11.8 12.2 12.7 12.2 11.4 11.0 9.7 11.2 11.1 12.6 139.2
Average snowy days (≥ 0.2 cm) 12.1 9.2 5.7 1.4 0.0 0.0 0.0 0.0 0.0 0.3 4.1 10.0 42.8
Average relative humidity (%) 71.1 68.5 64.8 61.2 65.5 69.5 70.5 74.1 75.7 72.4 73.1 73.9 70.0
Average dew point °F (°C) 3.9
(−15.6) 		5.5
(−14.7) 		17.2
(−8.2) 		30.4
(−0.9) 		45.0
(7.2) 		55.0
(12.8) 		60.3
(15.7) 		59.4
(15.2) 		52.3
(11.3) 		38.5
(3.6) 		25.7
(−3.5) 		10.4
(−12.0) 		33.6
(0.9)
Mean monthly sunshine hours 141.1 158.5 200.3 218.9 248.9 262.2 289.2 253.2 210.5 168.8 100.7 108.3 2,360.6
Percent possible sunshine 48 54 54 54 55 57 62 59 56 49 34 38 53
Average ultraviolet index 1 2 4 5 7 8 8 7 6 3 2 1 5
Source 1: NOAA (relative humidity, dew point, and sun 1961–1990)[15][16][17]
Source 2: Weather Atlas[18]

Syracuse - Humid continental (Dfa)[edit]

Syracuse
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
66
 
 
−5
−14
 
 
62
 
 
−4
−13
 
 
77
 
 
3
−7
 
 
88
 
 
13
1
 
 
87
 
 
21
9
 
 
90
 
 
25
14
 
 
98
 
 
28
17
 
 
94
 
 
27
16
 
 
86
 
 
23
12
 
 
99
 
 
15
5
 
 
82
 
 
6
−3
 
 
83
 
 
−2
−10
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[19]
Imperial conversion
JFMAMJJASOND
 
 
2.6
 
 
23
8
 
 
2.4
 
 
25
8
 
 
3
 
 
37
20
 
 
3.5
 
 
55
34
 
 
3.4
 
 
69
47
 
 
3.5
 
 
77
57
 
 
3.9
 
 
82
62
 
 
3.7
 
 
80
60
 
 
3.4
 
 
73
53
 
 
3.9
 
 
58
41
 
 
3.2
 
 
43
27
 
 
3.3
 
 
28
15
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Syracuse Hancock International Airport, New York (1991–2020 normals,[e] extremes 1902–present[f])
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 61
(16) 		66
(19) 		82
(28) 		90
(32) 		97
(36) 		100
(38) 		102
(39) 		100
(38) 		99
(37) 		86
(30) 		75
(24) 		63
(17) 		102
(39)
Mean maximum °F (°C) 48.0
(8.9) 		45.3
(7.4) 		61.5
(16.4) 		78.8
(26.0) 		87.8
(31.0) 		91.2
(32.9) 		92.8
(33.8) 		91.4
(33.0) 		88.3
(31.3) 		77.7
(25.4) 		63.3
(17.4) 		50.2
(10.1) 		94.3
(34.6)
Mean daily maximum °F (°C) 22.6
(−5.2) 		24.6
(−4.1) 		37.0
(2.8) 		54.7
(12.6) 		69.3
(20.7) 		77.4
(25.2) 		81.7
(27.6) 		80.2
(26.8) 		73.0
(22.8) 		58.3
(14.6) 		43.0
(6.1) 		28.0
(−2.2) 		54.2
(12.3)
Daily mean °F (°C) 15.1
(−9.4) 		16.5
(−8.6) 		28.4
(−2.0) 		44.4
(6.9) 		58.3
(14.6) 		66.9
(19.4) 		71.8
(22.1) 		70.3
(21.3) 		63.0
(17.2) 		49.5
(9.7) 		35.1
(1.7) 		21.4
(−5.9) 		45.1
(7.3)
Mean daily minimum °F (°C) 7.5
(−13.6) 		8.4
(−13.1) 		19.8
(−6.8) 		34.3
(1.3) 		47.3
(8.5) 		56.7
(13.7) 		62.1
(16.7) 		60.4
(15.8) 		52.7
(11.5) 		40.6
(4.8) 		27.3
(−2.6) 		14.7
(−9.6) 		36.0
(2.2)
Mean minimum °F (°C) −15.2
(−26.2) 		−11.9
(−24.4) 		0.0
(−17.8) 		21.4
(−5.9) 		34.2
(1.2) 		43.9
(6.6) 		52.0
(11.1) 		49.3
(9.6) 		37.9
(3.3) 		27.0
(−2.8) 		8.4
(−13.1) 		−5.4
(−20.8) 		−18.6
(−28.1)
Record low °F (°C) −35
(−37) 		−35
(−37) 		−22
(−30) 		5
(−15) 		25
(−4) 		34
(1) 		45
(7) 		37
(3) 		25
(−4) 		16
(−9) 		−6
(−21) 		−35
(−37) 		−35
(−37)
Average precipitation inches (mm) 2.6
(66) 		2.4
(62) 		3.0
(77) 		3.5
(88) 		3.4
(87) 		3.5
(90) 		3.9
(98) 		3.7
(94) 		3.4
(86) 		3.9
(99) 		3.2
(82) 		3.3
(83) 		39.8
(1,012)
Average snowfall inches (cm) 38
(96) 		30
(77) 		24
(60) 		3.5
(9) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.4
(1) 		14
(35) 		39
(98) 		148.9
(376)
Average extreme snow depth inches (cm) 22
(57) 		31
(79) 		29
(73) 		3.5
(9) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		4.7
(12) 		15
(38) 		33
(85)
Average precipitation days (≥ 0.2 mm) 18.9 16.6 15.5 14.5 13.2 12.0 11.7 10.7 11.1 15.1 15.9 18.5 173.7
Average snowy days (≥ 0.2 cm) 17.8 15.2 10.1 2.5 0.1 0.0 0.0 0.0 0.0 0.6 5.9 16.6 68.8
Average relative humidity (%) 73.2 72.3 69.6 65.2 67.1 69.9 70.5 74.9 76.4 74.3 75.4 76.8 72.1
Average dew point °F (°C) 6.3
(−14.3) 		7.3
(−13.7) 		18.7
(−7.4) 		31.5
(−0.3) 		45.1
(7.3) 		55.0
(12.8) 		59.9
(15.5) 		59.7
(15.4) 		53.1
(11.7) 		39.9
(4.4) 		27.3
(−2.6) 		12.7
(−10.7) 		34.7
(1.5)
Mean monthly sunshine hours 102.8 116.7 172.5 204.4 243.1 260.6 289.3 247.1 193.0 144.3 76.7 69.0 2,119.5
Percent possible sunshine 35 40 47 51 53 57 62 57 51 42 26 25 48
Source: NOAA (relative humidity, dew point, and sun 1961–1990)[21][22][23]

Buffalo - Humid continental (Dfa)[edit]

Buffalo
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
85
 
 
−5
−12
 
 
63
 
 
−4
−12
 
 
73
 
 
2
−6
 
 
86
 
 
12
2
 
 
86
 
 
20
9
 
 
86
 
 
24
15
 
 
82
 
 
27
17
 
 
82
 
 
26
17
 
 
104
 
 
22
13
 
 
102
 
 
14
6
 
 
89
 
 
6
−2
 
 
95
 
 
−2
−9
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[24]
Imperial conversion
JFMAMJJASOND
 
 
3.3
 
 
23
10
 
 
2.5
 
 
24
11
 
 
2.9
 
 
36
21
 
 
3.4
 
 
53
35
 
 
3.4
 
 
67
48
 
 
3.4
 
 
76
58
 
 
3.2
 
 
80
63
 
 
3.2
 
 
79
62
 
 
4.1
 
 
72
55
 
 
4
 
 
58
42
 
 
3.5
 
 
42
29
 
 
3.7
 
 
28
17
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Buffalo (Buffalo Niagara International Airport), 1991–2020 normals,[g] extremes 1871–present[h]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 63
(17) 		63
(17) 		77
(25) 		91
(33) 		93
(34) 		97
(36) 		99
(37) 		99
(37) 		99
(37) 		90
(32) 		75
(24) 		64
(18) 		99
(37)
Mean maximum °F (°C) 47.5
(8.6) 		45.5
(7.5) 		60.6
(15.9) 		76.1
(24.5) 		84.4
(29.1) 		88.2
(31.2) 		89.4
(31.9) 		88.5
(31.4) 		86.4
(30.2) 		76.1
(24.5) 		62.1
(16.7) 		47.8
(8.8) 		91.6
(33.1)
Mean daily maximum °F (°C) 23.2
(−4.9) 		24.3
(−4.3) 		36.3
(2.4) 		52.9
(11.6) 		67.5
(19.7) 		75.6
(24.2) 		80.2
(26.8) 		79.0
(26.1) 		72.3
(22.4) 		57.7
(14.3) 		42.4
(5.8) 		28.2
(−2.1) 		53.3
(11.8)
Daily mean °F (°C) 16.5
(−8.6) 		17.4
(−8.1) 		28.8
(−1.8) 		43.9
(6.6) 		57.9
(14.4) 		66.9
(19.4) 		71.8
(22.1) 		70.3
(21.3) 		63.3
(17.4) 		49.8
(9.9) 		35.6
(2.0) 		22.5
(−5.3) 		45.4
(7.4)
Mean daily minimum °F (°C) 10.0
(−12.2) 		10.6
(−11.9) 		21.0
(−6.1) 		34.7
(1.5) 		48.4
(9.1) 		58.1
(14.5) 		63.1
(17.3) 		61.7
(16.5) 		54.5
(12.5) 		42.1
(5.6) 		28.8
(−1.8) 		16.5
(−8.6) 		37.5
(3.0)
Mean minimum °F (°C) −8.1
(−22.3) 		−7.2
(−21.8) 		3.9
(−15.6) 		22.8
(−5.1) 		35.6
(2.0) 		45.7
(7.6) 		52.9
(11.6) 		51.1
(10.6) 		41.0
(5.0) 		28.9
(−1.7) 		15.1
(−9.4) 		−0.6
(−18.1) 		−11.7
(−24.3)
Record low °F (°C) −26
(−32) 		−29
(−34) 		−13
(−25) 		3
(−16) 		25
(−4) 		36
(2) 		43
(6) 		37
(3) 		32
(0) 		18
(−8) 		−4
(−20) 		−18
(−28) 		−29
(−34)
Average precipitation inches (mm) 3.3
(85) 		2.5
(63) 		2.9
(73) 		3.4
(86) 		3.4
(86) 		3.4
(86) 		3.2
(82) 		3.2
(82) 		4.1
(104) 		4.0
(102) 		3.5
(89) 		3.7
(95) 		40.6
(1,033)
Average snowfall inches (cm) 35
(88) 		26
(66) 		18
(46) 		3.1
(8) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		1.2
(3) 		13
(34) 		37
(94) 		133.3
(339)
Average extreme snow depth inches (cm) 19.3
(48.9) 		22.3
(56.7) 		22.4
(57.0) 		1.4
(3.5) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.1) 		4.9
(12.4) 		13.4
(34.1) 		23.2
(59.0)
Average precipitation days (≥ 0.2 mm) 19.2 15.8 14.8 13.4 12.8 11.9 10.8 10.0 10.9 14.1 14.4 17.7 165.8
Average snowy days (≥ 0.2 cm) 18.4 16.5 9.1 3.2 0.0 0.0 0.0 0.0 0.0 0.6 6.7 16.2 70.7
Average relative humidity (%) 76.0 75.9 73.3 67.8 67.2 68.6 68.1 72.1 74.0 72.9 75.8 77.6 72.4
Average dew point °F (°C) 7.9
(−13.4) 		8.6
(−13.0) 		19.8
(−6.8) 		31.6
(−0.2) 		44.2
(6.8) 		54.1
(12.3) 		59.0
(15.0) 		58.8
(14.9) 		52.5
(11.4) 		39.9
(4.4) 		27.3
(−2.6) 		13.6
(−10.2) 		34.8
(1.6)
Mean monthly sunshine hours 91.3 108.0 163.7 204.7 258.3 287.1 306.7 266.4 207.6 159.4 84.4 69.0 2,206.6
Percent possible sunshine 31 37 44 51 57 63 66 62 55 47 29 25 49
Average ultraviolet index 1 2 4 6 7 8 8 8 6 4 2 1 5
Source 1: NOAA (relative humidity and sun 1961–1990)[25][26][27]
Source 2: Weather Atlas[28]
  1. ^ Mean monthly maxima and minima (i.e. the expected highest and lowest temperature readings at any point during the year or given month) calculated based on data at said location from 1991 to 2020.
  2. ^ Official records for Boston were kept at downtown from January 1872 to December 1935, and at Logan Airport (KBOS) since January 1936.[5]
  3. ^ Mean monthly maxima and minima (i.e. the expected highest and lowest temperature readings at any point during the year or given month) calculated based on data at said location from 1991 to 2020.
  4. ^ Official records for Albany kept January 1874 to May 1938 at downtown and at Albany Int'l since June 1938. For more information, see Threadex
  5. ^ Mean monthly maxima and minima (i.e. the expected highest and lowest temperature readings at any point during the year or given month) calculated based on data at said location from 1991 to 2020.
  6. ^ Official records for Syracuse kept at downtown from August 1902 to April 1938, Syracuse Municipal Airport from May 1938 to September 17, 1949, and at Syracuse Hancock Int'l since September 18, 1949.[20]
  7. ^ Mean monthly maxima and minima (i.e. the expected highest and lowest temperature readings at any point during the year or given month) calculated based on data at said location from 1991 to 2020.
  8. ^ Official records for Buffalo kept January 1871 to June 1943 at downtown and at Buffalo Niagara Int'l since July 1943. For more information, see Threadex
  1. ^ Cite error: The named reference Portland, Maine Weatherbox NOAA txt was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Pittsfield Weatherbox NOAA txt was invoked but never defined (see the help page).
  3. ^ "PITTSFIELD MUNI AP, MASSACHUSETTS - Climate Summary".
  4. ^ a b "Summary of Monthly Normals 1991–2020". National Oceanic and Atmospheric Administration. Retrieved May 4, 2021.
  5. ^ ThreadEx
  6. ^ "NowData - NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved May 24, 2021.
  7. ^ "WMO Climate Normals for BOSTON/LOGAN INT'L AIRPORT, MA 1961–1990". National Oceanic and Atmospheric Administration. Retrieved July 18, 2020.
  8. ^ "Boston, Massachusetts, USA - Monthly weather forecast and Climate data". Weather Atlas. Retrieved July 4, 2019.
  9. ^ Cite error: The named reference Nantucket Weatherbox NOAA txt was invoked but never defined (see the help page).
  10. ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved May 30, 2021.
  11. ^ "Station: Nantucket Mem AP, MA". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Retrieved May 30, 2021.
  12. ^ Cite error: The named reference Providence Weatherbox NOAA txt was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Hartford Weatherbox NOAA txt was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Albany Weatherbox NOAA txt was invoked but never defined (see the help page).
  15. ^ "Summary of Monthly Normals 1991–2020". National Oceanic and Atmospheric Administration. Archived from the original on May 4, 2021. Retrieved May 4, 2021.
  16. ^ "NowData - NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved May 4, 2021.
  17. ^ "WMO Climate Normals for ALBANY/ALBANY COUNTY, NY 1961–1990". National Oceanic and Atmospheric Administration. Retrieved September 16, 2020.
  18. ^ "Albany, NY - Detailed climate information and monthly weather forecast". Weather Atlas. Yu Media Group. Retrieved June 29, 2019.
  19. ^ Cite error: The named reference Syracuse Weatherbox NOAA txt was invoked but never defined (see the help page).
  20. ^ "Threaded Extremes". threadex.rcc-acis.org. Archived from the original on May 19, 2006. Retrieved November 26, 2021.
  21. ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Archived from the original on January 11, 2019. Retrieved May 4, 2021.
  22. ^ "Summary of Monthly Normals 1991–2020". National Oceanic and Atmospheric Administration. Archived from the original on May 5, 2021. Retrieved May 4, 2021.
  23. ^ "WMO Climate Normals for SYRACUSE/HANCOCK INT'L ARPT NY 1961–1990". National Oceanic and Atmospheric Administration. Archived from the original on July 21, 2020. Retrieved September 4, 2020.
  24. ^ Cite error: The named reference Buffalo Weatherbox NOAA txt was invoked but never defined (see the help page).
  25. ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved May 4, 2021.
  26. ^ "Summary of Monthly Normals 1991–2020". National Oceanic and Atmospheric Administration. Archived from the original on May 4, 2021. Retrieved May 4, 2021.
  27. ^ "WMO Climate Normals for Buffalo/Greater Buffalo, NY 1961–1990". National Oceanic and Atmospheric Administration. Retrieved September 18, 2020.
  28. ^ "Buffalo, New York, USA - Monthly weather forecast and Climate data". Weather Atlas. Retrieved July 3, 2019.

New York - Humid continental (Dfa)[edit]

New York
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
92
 
 
−1
−7
 
 
81
 
 
1
−6
 
 
109
 
 
7
−1
 
 
104
 
 
16
7
 
 
101
 
 
22
13
 
 
115
 
 
27
18
 
 
117
 
 
29
21
 
 
116
 
 
29
21
 
 
109
 
 
25
17
 
 
111
 
 
17
10
 
 
91
 
 
9
3
 
 
111
 
 
2
−4
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[1]
Imperial conversion
JFMAMJJASOND
 
 
3.6
 
 
31
19
 
 
3.2
 
 
33
20
 
 
4.3
 
 
44
30
 
 
4.1
 
 
60
44
 
 
4
 
 
71
55
 
 
4.5
 
 
80
64
 
 
4.6
 
 
85
70
 
 
4.6
 
 
83
69
 
 
4.3
 
 
76
62
 
 
4.4
 
 
63
50
 
 
3.6
 
 
49
37
 
 
4.4
 
 
35
25
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for New York (Belvedere Castle, Central Park), 1991–2020 normals,[a] extremes 1869–present[b]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 63
(17) 		70
(21) 		81
(27) 		95
(35) 		99
(37) 		100
(38) 		106
(41) 		104
(40) 		102
(39) 		91
(33) 		79
(26) 		66
(19) 		106
(41)
Mean maximum °F (°C) 51.4
(10.8) 		51.6
(10.9) 		64.9
(18.3) 		81.1
(27.3) 		88.5
(31.4) 		92.1
(33.4) 		95.7
(35.4) 		93.4
(34.1) 		89.1
(31.7) 		77.9
(25.5) 		65.3
(18.5) 		54.0
(12.2) 		97.0
(36.1)
Mean daily maximum °F (°C) 30.6
(−0.8) 		33.3
(0.7) 		44.4
(6.9) 		60.1
(15.6) 		71.4
(21.9) 		79.7
(26.5) 		84.9
(29.4) 		83.3
(28.5) 		76.3
(24.6) 		62.8
(17.1) 		48.6
(9.2) 		35.2
(1.8) 		59.2
(15.1)
Daily mean °F (°C) 24.6
(−4.1) 		27.0
(−2.8) 		37.4
(3.0) 		52.0
(11.1) 		63.1
(17.3) 		72.0
(22.2) 		77.5
(25.3) 		76.1
(24.5) 		69.3
(20.7) 		56.1
(13.4) 		42.6
(5.9) 		30.0
(−1.1) 		52.3
(11.3)
Mean daily minimum °F (°C) 18.9
(−7.3) 		20.5
(−6.4) 		30.4
(−0.9) 		43.7
(6.5) 		55.0
(12.8) 		64.4
(18.0) 		70.2
(21.2) 		68.9
(20.5) 		62.2
(16.8) 		49.6
(9.8) 		36.7
(2.6) 		24.8
(−4.0) 		45.4
(7.5)
Mean minimum °F (°C) 0.9
(−17.3) 		3.7
(−15.7) 		14.4
(−9.8) 		30.9
(−0.6) 		43.9
(6.6) 		52.7
(11.5) 		61.9
(16.6) 		60.3
(15.7) 		50.2
(10.1) 		36.7
(2.6) 		22.3
(−5.4) 		9.0
(−12.8) 		−1.3
(−18.5)
Record low °F (°C) −15
(−26) 		−24
(−31) 		−2
(−19) 		10
(−12) 		32
(0) 		45
(7) 		52
(11) 		50
(10) 		39
(4) 		27
(−3) 		0
(−18) 		−22
(−30) 		−24
(−31)
Average precipitation inches (mm) 3.6
(92) 		3.2
(81) 		4.3
(109) 		4.1
(104) 		4.0
(101) 		4.5
(115) 		4.6
(117) 		4.6
(116) 		4.3
(109) 		4.4
(111) 		3.6
(91) 		4.4
(111) 		49.6
(1,257)
Average snowfall inches (cm) 30
(77) 		26
(66) 		10
(26) 		0.8
(2) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.1) 		3.2
(8.1) 		28
(72) 		98
(251.2)
Average precipitation days (≥ 0.2 mm) 10.8 10.0 11.1 11.4 11.5 11.2 10.5 10.0 8.8 9.5 9.2 11.4 125.4
Average snowy days (≥ 0.2 cm) 8.0 7.8 3.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1 1.8 6.7 27.5
Average relative humidity (%) 61.5 60.2 58.5 55.3 62.7 65.2 64.2 66.0 67.8 65.6 64.6 64.1 63.0
Average dew point °F (°C) 9.0
(−12.8) 		10.0
(−12.2) 		20.5
(−6.4) 		32.2
(0.1) 		47.3
(8.5) 		57.4
(14.1) 		61.9
(16.6) 		62.1
(16.7) 		55.6
(13.1) 		42.3
(5.7) 		28.6
(−1.9) 		15.6
(−9.1) 		36.9
(2.7)
Mean monthly sunshine hours 162.7 163.1 212.5 225.6 256.6 257.3 268.2 268.2 219.3 211.2 151.0 139.0 2,534.7
Percent possible sunshine 54 55 57 57 57 57 59 63 59 61 51 48 57
Average ultraviolet index 2 3 4 6 7 8 8 8 6 4 2 1 5
Source 1: NOAA (relative humidity and sun 1961–1990; dew point 1965–1984)[3][4][5][6]
Source 2: Weather Atlas[7]

See Climate of New York City for additional climate information from the outer boroughs.

Pennsylvania[edit]

Scranton - Humid continental (Dfa)[edit]

Scranton
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
66
 
 
−3
−12
 
 
53
 
 
−1
−11
 
 
70
 
 
6
−5
 
 
83
 
 
15
3
 
 
83
 
 
22
10
 
 
97
 
 
27
15
 
 
92
 
 
29
17
 
 
98
 
 
28
16
 
 
105
 
 
24
12
 
 
94
 
 
16
5
 
 
72
 
 
8
−2
 
 
71
 
 
0
−8
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[8]
Imperial conversion
JFMAMJJASOND
 
 
2.6
 
 
27
11
 
 
2.1
 
 
30
13
 
 
2.8
 
 
42
24
 
 
3.3
 
 
59
38
 
 
3.3
 
 
72
50
 
 
3.8
 
 
80
58
 
 
3.6
 
 
85
63
 
 
3.9
 
 
82
61
 
 
4.1
 
 
75
54
 
 
3.7
 
 
61
42
 
 
2.8
 
 
46
29
 
 
2.8
 
 
31
17
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Wilkes-Barre/Scranton Int'l Airport, Pennsylvania (1991–2020 normals,[c] extremes 1901–present[d])
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 61
(16) 		66
(19) 		79
(26) 		91
(33) 		93
(34) 		99
(37) 		102
(39) 		102
(39) 		100
(38) 		90
(32) 		75
(24) 		63
(17) 		102
(39)
Mean maximum °F (°C) 48
(9) 		48
(9) 		63
(17) 		79
(26) 		88
(31) 		90
(32) 		93
(34) 		91
(33) 		88
(31) 		77
(25) 		64
(18) 		52
(11) 		93
(34)
Mean daily maximum °F (°C) 26.8
(−2.9) 		29.8
(−1.2) 		42.3
(5.7) 		59.4
(15.2) 		72.1
(22.3) 		79.9
(26.6) 		84.6
(29.2) 		82.4
(28.0) 		75.0
(23.9) 		61.3
(16.3) 		45.9
(7.7) 		31.3
(−0.4) 		57.6
(14.2)
Daily mean °F (°C) 19.0
(−7.2) 		21.4
(−5.9) 		32.9
(0.5) 		48.4
(9.1) 		61.0
(16.1) 		69.1
(20.6) 		73.8
(23.2) 		71.8
(22.1) 		64.6
(18.1) 		51.4
(10.8) 		37.2
(2.9) 		24.3
(−4.3) 		47.9
(8.8)
Mean daily minimum °F (°C) 11.3
(−11.5) 		12.9
(−10.6) 		23.5
(−4.7) 		37.6
(3.1) 		49.6
(9.8) 		58.1
(14.5) 		62.8
(17.1) 		61.2
(16.2) 		54.0
(12.2) 		41.5
(5.3) 		28.9
(−1.7) 		17.2
(−8.2) 		38.2
(3.5)
Mean minimum °F (°C) −8
(−22) 		−6
(−21) 		5
(−15) 		23
(−5) 		36
(2) 		45
(7) 		52
(11) 		48
(9) 		39
(4) 		27
(−3) 		12
(−11) 		0
(−18) 		−11
(−24)
Record low °F (°C) −29
(−34) 		−27
(−33) 		−9
(−23) 		7
(−14) 		27
(−3) 		34
(1) 		43
(6) 		37
(3) 		28
(−2) 		18
(−8) 		0
(−18) 		−22
(−30) 		−29
(−34)
Average precipitation inches (mm) 2.6
(66) 		2.1
(53) 		2.8
(70) 		3.3
(83) 		3.3
(83) 		3.8
(97) 		3.6
(92) 		3.9
(98) 		4.1
(105) 		3.7
(94) 		2.8
(72) 		2.8
(71) 		38.8
(984)
Average snowfall inches (cm) 23
(58) 		18
(45) 		14
(36) 		1.2
(3) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.9
(2.4) 		5.5
(14) 		21
(53) 		83.6
(211.4)
Average precipitation days (≥ 0.2 mm) 12.6 11.4 11.8 12.2 12.9 12.9 11.1 11.1 10.0 10.7 10.3 12.1 139.1
Average snowy days (≥ 0.2 cm) 10.7 9.4 5.8 1.3 0.0 0.0 0.0 0.0 0.0 0.4 2.7 8.3 38.6
Average relative humidity (%) 70.1 67.5 63.3 60.4 64.6 70.5 71.1 73.8 75.2 71.6 71.8 72.5 69.4
Average dew point °F (°C) 7.2
(−13.8) 		8.2
(−13.2) 		19.0
(−7.2) 		31.3
(−0.4) 		45.3
(7.4) 		55.9
(13.3) 		60.4
(15.8) 		59.9
(15.5) 		53.4
(11.9) 		39.6
(4.2) 		26.8
(−2.9) 		13.3
(−10.4) 		35.0
(1.7)
Mean monthly sunshine hours 130.3 143.7 185.7 210.5 246.9 269.7 285.7 257.2 200.2 173.3 104.3 95.9 2,303.4
Percent possible sunshine 44 48 50 53 55 60 62 60 54 50 35 33 52
Source: NOAA (relative humidity and dew point 1964–1990, sun 1961–1990)[10][11][12]


Pittsburgh - Humid continental (Dfa)[edit]

Pittsburgh
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
75
 
 
−3
−11
 
 
67
 
 
−1
−10
 
 
80
 
 
7
−4
 
 
84
 
 
16
4
 
 
97
 
 
22
10
 
 
105
 
 
26
15
 
 
108
 
 
28
17
 
 
89
 
 
28
17
 
 
84
 
 
24
13
 
 
72
 
 
16
6
 
 
73
 
 
8
−2
 
 
72
 
 
0
−8
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[13]
Imperial conversion
JFMAMJJASOND
 
 
3
 
 
27
12
 
 
2.6
 
 
31
14
 
 
3.1
 
 
44
25
 
 
3.3
 
 
61
39
 
 
3.8
 
 
72
51
 
 
4.1
 
 
79
59
 
 
4.3
 
 
83
63
 
 
3.5
 
 
82
62
 
 
3.3
 
 
75
55
 
 
2.8
 
 
61
42
 
 
2.9
 
 
46
29
 
 
2.8
 
 
32
18
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Pittsburgh (Pittsburgh International Airport), 1991–2020 normals,[e] extremes 1874–present[f]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 66
(19) 		70
(21) 		79
(26) 		88
(31) 		95
(35) 		99
(37) 		102
(39) 		102
(39) 		102
(39) 		90
(32) 		77
(25) 		64
(18) 		102
(39)
Mean maximum °F (°C) 52.5
(11.4) 		54.1
(12.3) 		68.2
(20.1) 		79.7
(26.5) 		86.7
(30.4) 		90.3
(32.4) 		91.2
(32.9) 		90.3
(32.4) 		88.2
(31.2) 		78.1
(25.6) 		65.5
(18.6) 		53.6
(12.0) 		92.7
(33.7)
Mean daily maximum °F (°C) 27.3
(−2.6) 		30.6
(−0.8) 		43.7
(6.5) 		60.6
(15.9) 		72.0
(22.2) 		79.3
(26.3) 		82.9
(28.3) 		81.7
(27.6) 		75.0
(23.9) 		61.3
(16.3) 		45.5
(7.5) 		31.6
(−0.2) 		57.6
(14.2)
Daily mean °F (°C) 19.8
(−6.8) 		22.5
(−5.3) 		34.3
(1.3) 		49.6
(9.8) 		61.2
(16.2) 		69.4
(20.8) 		73.2
(22.9) 		71.8
(22.1) 		64.9
(18.3) 		51.6
(10.9) 		37.2
(2.9) 		24.6
(−4.1) 		48.3
(9.1)
Mean daily minimum °F (°C) 12.4
(−10.9) 		14.2
(−9.9) 		25.0
(−3.9) 		38.8
(3.8) 		50.5
(10.3) 		59.4
(15.2) 		63.3
(17.4) 		62.1
(16.7) 		54.9
(12.7) 		41.9
(5.5) 		28.9
(−1.7) 		17.8
(−7.9) 		39.1
(3.9)
Mean minimum °F (°C) −8.0
(−22.2) 		−4.0
(−20.0) 		6.3
(−14.3) 		23.5
(−4.7) 		35.6
(2.0) 		45.1
(7.3) 		52.5
(11.4) 		51.1
(10.6) 		41.2
(5.1) 		27.7
(−2.4) 		13.8
(−10.1) 		0.7
(−17.4) 		−10.5
(−23.6)
Record low °F (°C) −31
(−35) 		−29
(−34) 		−11
(−24) 		9
(−13) 		27
(−3) 		34
(1) 		43
(6) 		39
(4) 		30
(−1) 		14
(−10) 		−6
(−21) 		−20
(−29) 		−31
(−35)
Average precipitation inches (mm) 3.0
(75) 		2.6
(67) 		3.1
(80) 		3.3
(84) 		3.8
(97) 		4.1
(105) 		4.3
(108) 		3.5
(89) 		3.3
(84) 		2.8
(72) 		2.9
(73) 		2.8
(72) 		39.5
(1,006)
Average snowfall inches (cm) 31.6
(80.3) 		22.3
(56.7) 		10.7
(27.3) 		1.8
(4.6) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.7
(1.8) 		6.9
(17.6) 		22.9
(58.2) 		96.9
(246.5)
Average precipitation days (≥ 0.1 mm) 16.8 13.9 14.0 13.9 13.5 12.4 11.2 10.5 9.8 11.1 12.0 14.6 153.7
Average snowy days (≥ 0.1 cm) 14.2 10.3 6.9 1.6 0.0 0.0 0.0 0.0 0.0 0.5 4.3 10.0 47.8
Average relative humidity (%) 69.9 67.3 64.1 59.8 63.4 66.2 68.8 71.2 72.0 68.3 70.2 71.9 67.8
Average dew point °F (°C) 8.2
(−13.2) 		9.9
(−12.3) 		21.4
(−5.9) 		32.7
(0.4) 		45.9
(7.7) 		55.2
(12.9) 		60.1
(15.6) 		59.5
(15.3) 		53.4
(11.9) 		39.0
(3.9) 		27.0
(−2.8) 		14.2
(−9.9) 		35.5
(2.0)
Mean monthly sunshine hours 93.9 108.5 155.4 182.8 217.4 242.2 254.9 228.4 196.7 167.3 99.4 74.4 2,021.3
Percent possible sunshine 31 36 42 46 49 54 56 54 53 48 33 26 45
Average ultraviolet index 2 2 2 4 6 6 6 5 4 3 2 1 4
Source 1: NOAA (relative humidity, dew point and sun 1961–1990)[14][15][16][17]
Source 2: Weather Atlas (UV)[18]

Philadelphia - Humid continental (Dfa)[edit]

Philadelphia
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
80
 
 
0
−8
 
 
70
 
 
2
−8
 
 
101
 
 
9
−2
 
 
88
 
 
17
6
 
 
85
 
 
24
12
 
 
103
 
 
28
18
 
 
111
 
 
31
21
 
 
109
 
 
30
20
 
 
112
 
 
26
16
 
 
88
 
 
19
9
 
 
74
 
 
10
1
 
 
101
 
 
3
−5
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[19]
Imperial conversion
JFMAMJJASOND
 
 
3.1
 
 
32
17
 
 
2.8
 
 
35
19
 
 
4
 
 
47
29
 
 
3.5
 
 
63
42
 
 
3.3
 
 
74
54
 
 
4.1
 
 
83
64
 
 
4.4
 
 
88
70
 
 
4.3
 
 
86
68
 
 
4.4
 
 
79
61
 
 
3.5
 
 
65
47
 
 
2.9
 
 
51
33
 
 
4
 
 
37
22
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Philadelphia (Philadelphia Airport), 1991–2020 normals,[g] extremes 1872–present[h]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 64
(18) 		70
(21) 		82
(28) 		93
(34) 		97
(36) 		102
(39) 		104
(40) 		106
(41) 		102
(39) 		95
(35) 		79
(26) 		64
(18) 		106
(41)
Mean maximum °F (°C) 54.3
(12.4) 		54.5
(12.5) 		68.4
(20.2) 		82.6
(28.1) 		90.1
(32.3) 		94.8
(34.9) 		97.2
(36.2) 		94.8
(34.9) 		90.7
(32.6) 		80.8
(27.1) 		66.9
(19.4) 		55.2
(12.9) 		98.1
(36.7)
Mean daily maximum °F (°C) 32.4
(0.2) 		35.2
(1.8) 		47.5
(8.6) 		63.0
(17.2) 		74.5
(23.6) 		83.1
(28.4) 		87.8
(31.0) 		85.8
(29.9) 		79.0
(26.1) 		65.5
(18.6) 		50.5
(10.3) 		37.0
(2.8) 		61.8
(16.5)
Daily mean °F (°C) 24.6
(−4.1) 		27.0
(−2.8) 		38.1
(3.4) 		52.7
(11.5) 		64.2
(17.9) 		73.6
(23.1) 		78.6
(25.9) 		76.8
(24.9) 		70.0
(21.1) 		56.5
(13.6) 		42.1
(5.6) 		29.7
(−1.3) 		52.8
(11.6)
Mean daily minimum °F (°C) 17.1
(−8.3) 		18.5
(−7.5) 		28.9
(−1.7) 		42.4
(5.8) 		54.1
(12.3) 		63.9
(17.7) 		69.6
(20.9) 		67.8
(19.9) 		61.0
(16.1) 		47.5
(8.6) 		33.4
(0.8) 		22.3
(−5.4) 		43.9
(6.6)
Mean minimum °F (°C) 1.8
(−16.8) 		4.6
(−15.2) 		15.4
(−9.2) 		31.3
(−0.4) 		43.2
(6.2) 		53.2
(11.8) 		62.2
(16.8) 		60.3
(15.7) 		49.5
(9.7) 		35.2
(1.8) 		21.0
(−6.1) 		10.0
(−12.2) 		−0.4
(−18.0)
Record low °F (°C) −17
(−27) 		−20
(−29) 		0
(−18) 		12
(−11) 		28
(−2) 		45
(7) 		52
(11) 		45
(7) 		36
(2) 		23
(−5) 		3
(−16) 		−15
(−26) 		−20
(−29)
Average precipitation inches (mm) 3.1
(80) 		2.8
(70) 		4.0
(101) 		3.5
(88) 		3.3
(85) 		4.1
(103) 		4.4
(111) 		4.3
(109) 		4.4
(112) 		3.5
(88) 		2.9
(74) 		4.0
(101) 		44.1
(1,120)
Average snowfall inches (cm) 26.8
(68.0) 		22.2
(56.3) 		9.1
(23.1) 		0.5
(1.2) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		1.5
(3.8) 		27.1
(68.9) 		87.2
(221.3)
Average precipitation days (≥ 0.2 mm) 11.0 9.7 10.9 10.9 11.0 10.3 10.1 8.9 9.3 9.1 8.6 11.0 120.8
Average snowy days (≥ 0.2 cm) 7.6 6.5 3.1 0.2 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.0 24.7
Average relative humidity (%) 66.2 63.6 61.7 60.4 65.4 67.8 69.6 70.4 71.6 70.8 68.4 67.7 67.0
Average dew point °F (°C) 10.8
(−11.8) 		12.0
(−11.1) 		23.2
(−4.9) 		35.2
(1.8) 		49.5
(9.7) 		59.2
(15.1) 		64.6
(18.1) 		63.7
(17.6) 		57.2
(14.0) 		43.9
(6.6) 		30.2
(−1.0) 		16.5
(−8.6) 		38.8
(3.8)
Mean monthly sunshine hours 155.7 154.7 202.8 217.0 245.1 271.2 275.6 260.1 219.3 204.5 154.7 137.7 2,498.4
Percent possible sunshine 52 52 55 55 55 61 61 61 59 59 52 47 56
Average ultraviolet index 2 3 4 6 8 9 9 8 6 4 2 2 5
Source 1: NOAA (relative humidity, dew point and sun 1961–1990)[23][24][21]
Source 2: Weather Atlas (UV index)[25]

District of Columbia[edit]

Washington, D.C. - Humid continental (Dfa) / Humid subtropical (Cfa)[edit]

Washington, D.C.
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
73
 
 
2
−6
 
 
67
 
 
4
−5
 
 
89
 
 
11
1
 
 
82
 
 
19
8
 
 
100
 
 
25
14
 
 
107
 
 
30
20
 
 
110
 
 
32
22
 
 
83
 
 
31
22
 
 
100
 
 
27
18
 
 
93
 
 
20
10
 
 
74
 
 
12
2
 
 
87
 
 
4
−4
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[26]
Imperial conversion
JFMAMJJASOND
 
 
2.9
 
 
36
21
 
 
2.6
 
 
39
23
 
 
3.5
 
 
51
33
 
 
3.2
 
 
66
47
 
 
3.9
 
 
76
58
 
 
4.2
 
 
85
67
 
 
4.3
 
 
90
72
 
 
3.3
 
 
88
71
 
 
3.9
 
 
81
64
 
 
3.7
 
 
68
50
 
 
2.9
 
 
53
36
 
 
3.4
 
 
40
26
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Washington, D.C. (Reagan National Airport), 1991−2020 normals,[i] extremes 1871−present[j]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 70
(21) 		75
(24) 		88
(31) 		93
(34) 		99
(37) 		104
(40) 		106
(41) 		106
(41) 		104
(40) 		97
(36) 		81
(27) 		70
(21) 		106
(41)
Mean maximum °F (°C) 57.6
(14.2) 		59.2
(15.1) 		72.0
(22.2) 		84.6
(29.2) 		91.0
(32.8) 		95.7
(35.4) 		98.1
(36.7) 		96.4
(35.8) 		91.9
(33.3) 		82.8
(28.2) 		69.4
(20.8) 		58.1
(14.5) 		99.1
(37.3)
Mean daily maximum °F (°C) 35.8
(2.1) 		39.4
(4.1) 		51.1
(10.6) 		66.2
(19.0) 		76.5
(24.7) 		85.1
(29.5) 		89.6
(32.0) 		87.8
(31.0) 		80.8
(27.1) 		67.6
(19.8) 		52.9
(11.6) 		39.7
(4.3) 		64.4
(18.0)
Daily mean °F (°C) 28.6
(−1.9) 		30.9
(−0.6) 		42.3
(5.7) 		56.5
(13.6) 		67.3
(19.6) 		76.3
(24.6) 		81.0
(27.2) 		79.3
(26.3) 		72.3
(22.4) 		59.0
(15.0) 		44.4
(6.9) 		32.7
(0.4) 		55.9
(13.3)
Mean daily minimum °F (°C) 21.0
(−6.1) 		22.8
(−5.1) 		33.3
(0.7) 		46.6
(8.1) 		57.9
(14.4) 		67.5
(19.7) 		72.3
(22.4) 		71.1
(21.7) 		64.0
(17.8) 		50.4
(10.2) 		36.3
(2.4) 		25.5
(−3.6) 		47.4
(8.6)
Mean minimum °F (°C) 5.4
(−14.8) 		7.9
(−13.4) 		18.0
(−7.8) 		33.1
(0.6) 		45.5
(7.5) 		55.8
(13.2) 		63.9
(17.7) 		62.1
(16.7) 		51.3
(10.7) 		36.9
(2.7) 		23.4
(−4.8) 		12.4
(−10.9) 		3.4
(−15.9)
Record low °F (°C) −24
(−31) 		−24
(−31) 		−2
(−19) 		14
(−10) 		34
(1) 		43
(6) 		52
(11) 		48
(9) 		36
(2) 		25
(−4) 		5
(−15) 		−22
(−30) 		−24
(−31)
Average precipitation inches (mm) 2.9
(73) 		2.6
(67) 		3.5
(89) 		3.2
(82) 		3.9
(100) 		4.2
(107) 		4.3
(110) 		3.3
(83) 		3.9
(100) 		3.7
(93) 		2.9
(74) 		3.4
(87) 		41.8
(1,065)
Average snowfall inches (cm) 17
(42) 		13
(33) 		3.1
(8) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		1.6
(4) 		12
(30) 		46.7
(117)
Average precipitation days (≥ 0.2 mm) 9.7 9.3 11.0 10.8 11.6 10.6 10.5 8.7 8.7 8.3 8.4 10.1 117.7
Average snowy days (≥ 0.2 cm) 6.8 5.7 2.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.1 4.0 19.7
Average relative humidity (%) 62.1 60.5 58.6 58.0 64.5 65.8 66.9 69.3 69.7 67.4 64.7 64.1 64.3
Average dew point °F (°C) 12.7
(−10.7) 		14.5
(−9.7) 		25.9
(−3.4) 		37.9
(3.3) 		52.3
(11.3) 		61.5
(16.4) 		66.0
(18.9) 		65.8
(18.8) 		59.5
(15.3) 		45.7
(7.6) 		31.6
(−0.2) 		18.1
(−7.7) 		41.0
(5.0)
Mean monthly sunshine hours 144.6 151.8 204.0 228.2 260.5 283.2 280.5 263.1 225.0 203.6 150.2 133.0 2,527.7
Mean daily daylight hours 9.8 10.8 12.0 13.3 14.3 14.9 14.6 13.6 12.4 11.2 10.1 9.5 12.2
Percent possible sunshine 48 50 55 57 59 64 62 62 60 59 50 45 57
Average ultraviolet index 2 3 5 7 8 9 9 8 7 4 3 2 6
Source 1: NOAA (relative humidity, dew point and sun 1961−1990)[28][26][29][30]
Source 2: Weather Atlas (UV and daylight hours)[31]

Virginia[edit]

Richmond - Humid continental (Dfa) / Humid subtropical (Cfa)[edit]

Richmond
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
82
 
 
4
−7
 
 
66
 
 
6
−6
 
 
102
 
 
12
0
 
 
81
 
 
20
7
 
 
102
 
 
25
13
 
 
118
 
 
30
18
 
 
111
 
 
32
21
 
 
124
 
 
31
20
 
 
117
 
 
27
16
 
 
86
 
 
21
8
 
 
78
 
 
13
1
 
 
89
 
 
6
−5
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: NOAA[32]
Imperial conversion
JFMAMJJASOND
 
 
3.2
 
 
39
20
 
 
2.6
 
 
43
21
 
 
4
 
 
54
32
 
 
3.2
 
 
69
45
 
 
4
 
 
78
56
 
 
4.6
 
 
86
65
 
 
4.4
 
 
89
69
 
 
4.9
 
 
87
68
 
 
4.6
 
 
81
61
 
 
3.4
 
 
69
47
 
 
3.1
 
 
55
33
 
 
3.5
 
 
42
23
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Climate data for Richmond International Airport, Virginia (1991–2020 normals,[k] extremes 1887–present[l])
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 72
(22) 		73
(23) 		88
(31) 		95
(35) 		100
(38) 		104
(40) 		106
(41) 		108
(42) 		102
(39) 		97
(36) 		81
(27) 		72
(22) 		108
(42)
Mean maximum °F (°C) 61.2
(16.2) 		63.7
(17.6) 		75.0
(23.9) 		85.8
(29.9) 		91.6
(33.1) 		96.6
(35.9) 		98.6
(37.0) 		96.6
(35.9) 		92.8
(33.8) 		84.6
(29.2) 		71.8
(22.1) 		62.8
(17.1) 		99.7
(37.6)
Mean daily maximum °F (°C) 38.8
(3.8) 		42.6
(5.9) 		54.1
(12.3) 		68.5
(20.3) 		77.7
(25.4) 		85.6
(29.8) 		89.4
(31.9) 		87.4
(30.8) 		81.1
(27.3) 		69.1
(20.6) 		55.0
(12.8) 		42.4
(5.8) 		66.0
(18.9)
Daily mean °F (°C) 29.3
(−1.5) 		32.0
(0.0) 		43.0
(6.1) 		56.7
(13.7) 		66.7
(19.3) 		75.0
(23.9) 		79.3
(26.3) 		77.5
(25.3) 		71.2
(21.8) 		58.3
(14.6) 		44.2
(6.8) 		32.7
(0.4) 		55.5
(13.1)
Mean daily minimum °F (°C) 19.8
(−6.8) 		21.4
(−5.9) 		31.8
(−0.1) 		44.6
(7.0) 		55.8
(13.2) 		64.6
(18.1) 		69.3
(20.7) 		67.6
(19.8) 		61.2
(16.2) 		47.1
(8.4) 		33.4
(0.8) 		23.2
(−4.9) 		45.0
(7.2)
Mean minimum °F (°C) 2.1
(−16.6) 		7.0
(−13.9) 		16.2
(−8.8) 		30.0
(−1.1) 		42.1
(5.6) 		53.4
(11.9) 		61.0
(16.1) 		59.4
(15.2) 		48.7
(9.3) 		32.5
(0.3) 		18.9
(−7.3) 		9.1
(−12.7) 		0.1
(−17.7)
Record low °F (°C) −20
(−29) 		−18
(−28) 		5
(−15) 		18
(−8) 		30
(−1) 		39
(4) 		52
(11) 		46
(8) 		36
(2) 		19
(−7) 		5
(−15) 		−11
(−24) 		−20
(−29)
Average precipitation inches (mm) 3.2
(82) 		2.6
(66) 		4.0
(102) 		3.2
(81) 		4.0
(102) 		4.6
(118) 		4.4
(111) 		4.9
(124) 		4.6
(117) 		3.4
(86) 		3.1
(78) 		3.5
(89) 		45.5
(1,156)
Average snowfall inches (cm) 14
(36) 		9.1
(23) 		3.5
(9) 		0.4
(1) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		1.2
(3) 		9.8
(25) 		38
(97)
Average precipitation days (≥ 0.1 mm) 10.0 9.0 10.8 10.5 11.1 10.6 11.4 9.4 9.3 8.1 8.4 10.0 118.6
Average snowy days (≥ 0.1 cm) 4.9 3.7 2.0 0.9 0.0 0.0 0.0 0.0 0.0 0.0 1.6 3.9 17
Average relative humidity (%) 67.9 65.6 63.0 60.8 69.5 72.2 74.8 77.2 77.0 73.8 69.1 68.9 70.0
Average dew point °F (°C) 15.8
(−9.0) 		17.4
(−8.1) 		28.2
(−2.1) 		39.7
(4.3) 		54.1
(12.3) 		63.0
(17.2) 		67.6
(19.8) 		67.3
(19.6) 		60.6
(15.9) 		46.6
(8.1) 		32.7
(0.4) 		20.5
(−6.4) 		42.8
(6.0)
Mean monthly sunshine hours 172.5 179.7 233.3 261.6 288.0 306.4 301.4 278.9 237.9 222.8 183.5 163.0 2,829
Percent possible sunshine 56 59 63 66 65 69 67 66 64 64 60 55 64
Average ultraviolet index 2 3 5 7 8 9 9 9 7 5 3 2 6
Source 1: NOAA (relative humidity and sunshine hours 1961–1990)[33][34][35]
Source 2: Weather Atlas[36]
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  2. ^ Belvedere Castle at NYC Parks
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  9. ^ ThreadEx
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  20. ^ ThreadEx; search for location= "PA - Philadelphia", variable= "Station thread"
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