| | Clinton, MD | Severn, MD | United States |
| Rainfall | 43.8 | 42.7 | 38.1 |
| Snowfall | 15.3 | 16.3 | 27.8 |
| Precipitation Days | 108.4 | 112.3 | 106.2 |
| Sunny | 205 | 208 | 205 |
| Avg. July High | 87.6 | 87.7 | 85.8 |
| Avg. Jan. Low | 25.5 | 24 | 21.7 |
| Comfort Index (higher=better) | 7.4 | 7.3 | 7 |
| UV Index | 4.3 | 4 | 4.3 |
| Elevation ft. | 249 | 157 | 2443 |