| | Conshohocken, PA | Sterling, VA | United States |
| Rainfall | 47 | 42 | 38.1 |
| Snowfall | 16.8 | 21.5 | 27.8 |
| Precipitation Days | 113.3 | 116.2 | 106.2 |
| Sunny | 208 | 197 | 205 |
| Avg. July High | 87.2 | 85.8 | 85.8 |
| Avg. Jan. Low | 21.2 | 23.5 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.3 | 7 |
| UV Index | 4.1 | 4 | 4.3 |
| Elevation ft. | 207 | 292 | 2443 |