| Darby, PA | Alexandria, VA | United States |
Rainfall | 46.2 | 43 | 38.1 |
Snowfall | 16.5 | 14.1 | 27.8 |
Precipitation Days | 116.7 | 116.9 | 106.2 |
Sunny | 208 | 201 | 205 |
Avg. July High | 87.2 | 88.4 | 85.8 |
Avg. Jan. Low | 27.2 | 27 | 21.7 |
Comfort Index (higher=better) | 7.3 | 7.3 | 7 |
UV Index | 3.8 | 4.1 | 4.3 |
Elevation ft. | 49 | 36 | 2443 |