| Gaithersburg, MD | South San Francisco, CA | United States |
Rainfall | 42 | 22 | 38 |
Snowfall | 21 | 0 | 28 |
Precipitation | 113 | 68 | 106 |
Sunny | 202 | 259 | 205 |
Avg. July High | 85 | 67 | 86 |
Avg. Jan. Low | 25 | 45 | 22 |
Comfort Index (higher=better) | 7.3 | 8.4 | 7 |
UV Index | 4.1 | 4.9 | 4.3 |
Elevation | 502 | 16 | 2443 |