| | Bel Air North, MD | Charlestown, MD | United States |
| Rainfall | 46.9 | 46.2 | 38.1 |
| Snowfall | 19.6 | 15 | 27.8 |
| Precipitation Days | 122.6 | 115.7 | 106.2 |
| Sunny | 211 | 199 | 205 |
| Avg. July High | 88.4 | 87.7 | 85.8 |
| Avg. Jan. Low | 24.8 | 23.3 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.3 | 7 |
| UV Index | 3.9 | 4 | 4.3 |
| Elevation ft. | 396 | 36 | 2443 |