| | Mechanicsville, VA | Westminster, MD | United States |
| Rainfall | 44.4 | 43.5 | 38.1 |
| Snowfall | 12.3 | 26.1 | 27.8 |
| Precipitation Days | 111.6 | 120.1 | 106.2 |
| Sunny | 204 | 204 | 205 |
| Avg. July High | 89.6 | 85.7 | 85.8 |
| Avg. Jan. Low | 27.5 | 21.4 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.2 | 7 |
| UV Index | 4.4 | 3.8 | 4.3 |
| Elevation ft. | 167 | 722 | 2443 |