| | Fairland, MD | Preston, MD | United States |
| Rainfall | 44.2 | 45.4 | 38.1 |
| Snowfall | 14.5 | 11.4 | 27.8 |
| Precipitation Days | 109.6 | 107 | 106.2 |
| Sunny | 200 | 209 | 205 |
| Avg. July High | 88.1 | 88.4 | 85.8 |
| Avg. Jan. Low | 24.6 | 27.2 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.4 | 7 |
| UV Index | 4.1 | 3.9 | 4.3 |
| Elevation ft. | 413 | 46 | 2443 |