| Tredyffrin, PA | Willistown, PA | United States |
Rainfall | 48 | 47 | 38 |
Snowfall | 22 | 22 | 28 |
Precipitation | 117 | 119 | 106 |
Sunny | 202 | 202 | 205 |
Avg. July High | 87 | 87 | 86 |
Avg. Jan. Low | 20 | 20 | 22 |
Comfort Index (higher=better) | 7.2 | 7.2 | 7 |
UV Index | 4 | 4 | 4.3 |
Elevation | 316 | 358 | 2443 |