| Washington, DC | Gaithersburg, MD | United States |
Rainfall | 43 | 42 | 38 |
Snowfall | 14 | 21 | 28 |
Precipitation | 114 | 113 | 106 |
Sunny | 203 | 202 | 205 |
Avg. July High | 89 | 85 | 86 |
Avg. Jan. Low | 27 | 25 | 22 |
Comfort Index (higher=better) | 7.3 | 7.3 | 7 |
UV Index | 4.1 | 4.1 | 4.3 |
Elevation | 23 | 502 | 2443 |