| Philadelphia, PA | Rockville, MD | United States |
Rainfall | 47 | 42 | 38 |
Snowfall | 13 | 18 | 28 |
Precipitation | 119 | 112 | 106 |
Sunny | 207 | 203 | 205 |
Avg. July High | 87 | 85 | 86 |
Avg. Jan. Low | 26 | 25 | 22 |
Comfort Index (higher=better) | 7.3 | 7.4 | 7 |
UV Index | 3.8 | 4.1 | 4.3 |
Elevation | 46 | 456 | 2443 |