| | Glen Rock, PA | Centreville, MD | United States |
| Rainfall | 42.7 | 45.9 | 38.1 |
| Snowfall | 29.1 | 13.4 | 27.8 |
| Precipitation Days | 118.7 | 111.7 | 106.2 |
| Sunny | 199 | 210 | 205 |
| Avg. July High | 85.3 | 86.8 | 85.8 |
| Avg. Jan. Low | 20.5 | 25.7 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.4 | 7 |
| UV Index | 3.9 | 4.1 | 4.3 |
| Elevation ft. | 545 | 49 | 2443 |