| | Chestnuthill, PA | Radnor, PA | United States |
| Rainfall | 51.1 | 48.3 | 38.1 |
| Snowfall | 38.8 | 20.5 | 27.8 |
| Precipitation Days | 125.2 | 115.9 | 106.2 |
| Sunny | 192 | 204 | 205 |
| Avg. July High | 82.9 | 86.9 | 85.8 |
| Avg. Jan. Low | 16 | 21.3 | 21.7 |
| Comfort Index (higher=better) | 6.9 | 7.2 | 7 |
| UV Index | 3.7 | 3.8 | 4.3 |
| Elevation ft. | 989 | 430 | 2443 |