| CLIMATE | Westchester | Downers Grove | United States |
| Rainfall (in.) | 38.5 | 36.3 | 36.5 |
| Snowfall (in.) | 27.3 | 33 | 25 |
| Precipitation Days | 120 | 109 | 100 |
| Sunny Days | 187 | 192 | 205 |
| Avg. July High | 85 | 86 | 86.5 |
| Avg. Jan. Low | 16.9 | 14.1 | 20.5 |
| Comfort Index (higher=better) | 47 | 44 | 44 |
| UV Index | 3.6 | 3.4 | 4.3 |
| Elevation ft. | 637 | 746 | 1,443 |
