| | Perry Hall, MD | Essex, MD | United States |
| Rainfall | 44.1 | 42.6 | 38.1 |
| Snowfall | 20.3 | 14.9 | 27.8 |
| Precipitation Days | 118.1 | 112.6 | 106.2 |
| Sunny | 216 | 210 | 205 |
| Avg. July High | 87.5 | 88.8 | 85.8 |
| Avg. Jan. Low | 26.3 | 28.6 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.1 | 7 |
| UV Index | 4.1 | 4.1 | 4.3 |
| Elevation ft. | 253 | 39 | 2443 |