| | Timonium, MD | Petersburg, VA | United States |
| Rainfall | 45.7 | 45.6 | 38.1 |
| Snowfall | 20.5 | 6.4 | 27.8 |
| Precipitation Days | 122 | 104.4 | 106.2 |
| Sunny | 213 | 206 | 205 |
| Avg. July High | 87.1 | 90.1 | 85.8 |
| Avg. Jan. Low | 24.8 | 29.1 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.4 | 7 |
| UV Index | 4.1 | 4.6 | 4.3 |
| Elevation ft. | 407 | 72 | 2443 |