WASHINGTON DC DULLES AP, VA US
GHCN ID: USW00093738 · VA, US · 88.4 m elevation · Records 1960-2026 (66 years)
Primary station for Herndon, VA.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 42.6°F | 25.2°F | 33.9°F | 2.94 in | 6.9 in |
| February | 46.1°F | 26.7°F | 36.4°F | 2.61 in | 7.0 in |
| March | 54.8°F | 33.6°F | 44.2°F | 3.50 in | 3.9 in |
| April | 66.8°F | 43.2°F | 55.0°F | 3.47 in | 0.1 in |
| May | 75.0°F | 53.0°F | 64.0°F | 4.72 in | — |
| June | 83.1°F | 61.9°F | 72.5°F | 4.30 in | — |
| July | 87.6°F | 66.8°F | 77.2°F | 4.15 in | — |
| August | 86.3°F | 65.2°F | 75.7°F | 3.53 in | — |
| September | 79.3°F | 57.9°F | 68.6°F | 3.94 in | — |
| October | 67.8°F | 45.3°F | 56.6°F | 3.65 in | — |
| November | 56.5°F | 35.6°F | 46.0°F | 3.13 in | 0.3 in |
| December | 46.5°F | 29.0°F | 37.7°F | 3.30 in | 2.8 in |