Template:Washington, D.C. weatherbox
From Infogalactic: the planetary knowledge core
| Climate data for Washington, D.C. (Reagan National Airport), 1981−2010 normals, extremes 1871−present[lower-alpha 1] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 79 (26) |
84 (29) |
93 (34) |
95 (35) |
99 (37) |
104 (40) |
106 (41) |
106 (41) |
104 (40) |
96 (36) |
86 (30) |
79 (26) |
106 (41) |
| Average high °F (°C) | 43.4 (6.3) |
47.1 (8.4) |
55.9 (13.3) |
66.6 (19.2) |
75.4 (24.1) |
84.2 (29) |
88.4 (31.3) |
86.5 (30.3) |
79.5 (26.4) |
68.4 (20.2) |
57.9 (14.4) |
46.8 (8.2) |
66.7 (19.3) |
| Daily mean °F (°C) | 36.0 (2.2) |
39.0 (3.9) |
46.8 (8.2) |
56.8 (13.8) |
66.0 (18.9) |
75.2 (24) |
79.8 (26.6) |
78.1 (25.6) |
71.0 (21.7) |
59.5 (15.3) |
49.6 (9.8) |
39.7 (4.3) |
58.13 (14.53) |
| Average low °F (°C) | 28.6 (−1.9) |
30.9 (−0.6) |
37.6 (3.1) |
47.0 (8.3) |
56.5 (13.6) |
66.3 (19.1) |
71.1 (21.7) |
69.7 (20.9) |
62.4 (16.9) |
50.6 (10.3) |
41.2 (5.1) |
32.5 (0.3) |
49.5 (9.7) |
| Record low °F (°C) | −14 (−26) |
−15 (−26) |
4 (−16) |
15 (−9) |
33 (1) |
43 (6) |
52 (11) |
49 (9) |
36 (2) |
26 (−3) |
11 (−12) |
−13 (−25) |
−15 (−26) |
| Average precipitation inches (mm) | 2.81 (71.4) |
2.62 (66.5) |
3.48 (88.4) |
3.06 (77.7) |
3.99 (101.3) |
3.78 (96) |
3.73 (94.7) |
2.93 (74.4) |
3.72 (94.5) |
3.40 (86.4) |
3.17 (80.5) |
3.05 (77.5) |
39.74 (1,009.4) |
| Average snowfall inches (cm) | 5.6 (14.2) |
5.7 (14.5) |
1.3 (3.3) |
trace | 0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0.5 (1.3) |
2.3 (5.8) |
15.4 (39.1) |
| Average precipitation days (≥ 0.01 in) | 9.6 | 9.0 | 10.5 | 10.4 | 11.1 | 10.7 | 10.3 | 8.2 | 8.3 | 7.7 | 8.6 | 9.7 | 114.1 |
| Average snowy days (≥ 0.1 in) | 3.0 | 2.4 | 0.9 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 1.5 | 8.1 |
| 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 |
| 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 |
| Percent possible sunshine | 48 | 50 | 55 | 57 | 59 | 64 | 62 | 62 | 60 | 59 | 50 | 45 | 57 |
| Source: NOAA (relative humidity and sun 1961−1990)[2][3][4][5] | |||||||||||||
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