| | Downers Grove, IL | Orland Hills, IL | United States |
| Rainfall | 38.7 | 40.1 | 38.1 |
| Snowfall | 30.4 | 29.7 | 27.8 |
| Precipitation Days | 120.4 | 123.3 | 106.2 |
| Sunny | 192 | 187 | 205 |
| Avg. July High | 84.1 | 84 | 85.8 |
| Avg. Jan. Low | 14.9 | 16.5 | 21.7 |
| Comfort Index (higher=better) | 6.9 | 6.9 | 7 |
| UV Index | 3.4 | 3.6 | 4.3 |
| Elevation ft. | 741 | 702 | 2443 |