| Reston, VA | Landover, MD | United States |
Rainfall | 42.7 | 43.8 | 38.1 |
Snowfall | 21.5 | 13.3 | 27.8 |
Precipitation Days | 117.9 | 109.1 | 106.2 |
Sunny | 197 | 203 | 205 |
Avg. July High | 85.5 | 88.4 | 85.8 |
Avg. Jan. Low | 23.5 | 24.9 | 21.7 |
Comfort Index (higher=better) | 7.3 | 7.3 | 7 |
UV Index | 4 | 4.3 | 4.3 |
Elevation ft. | 331 | 59 | 2443 |