| | Exton, PA | Oakbrook Terrace, IL | United States |
| Rainfall | 48.7 | 38.7 | 38.1 |
| Snowfall | 28.5 | 31.2 | 27.8 |
| Precipitation Days | 124.1 | 120.6 | 106.2 |
| Sunny | 200 | 187 | 205 |
| Avg. July High | 84.8 | 83.9 | 85.8 |
| Avg. Jan. Low | 20.2 | 15.3 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 6.9 | 7 |
| UV Index | 4 | 3.4 | 4.3 |
| Elevation ft. | 315 | 686 | 2443 |