| | Jessup, MD | Jarrettsville, MD | United States |
| Rainfall | 43.5 | 46.4 | 38.1 |
| Snowfall | 15.6 | 28.5 | 27.8 |
| Precipitation Days | 111.9 | 121.1 | 106.2 |
| Sunny | 214 | 208 | 205 |
| Avg. July High | 87.7 | 86.6 | 85.8 |
| Avg. Jan. Low | 24.3 | 23.5 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.2 | 7 |
| UV Index | 4 | 3.9 | 4.3 |
| Elevation ft. | 207 | 646 | 2443 |