| | Washington, MO | Westmont, IL | United States |
| Rainfall | 43.8 | 38.7 | 38.1 |
| Snowfall | 12.3 | 31.2 | 27.8 |
| Precipitation Days | 107.4 | 120.2 | 106.2 |
| Sunny | 204 | 187 | 205 |
| Avg. July High | 88.9 | 83.9 | 85.8 |
| Avg. Jan. Low | 21.7 | 15.7 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 6.9 | 7 |
| UV Index | 4.1 | 3.4 | 4.3 |
| Elevation ft. | 554 | 748 | 2443 |