| | Williamsville, IL | Rochester, IL | United States |
| Rainfall | 39 | 38 | 38 |
| Snowfall | 19 | 18 | 28 |
| Precipitation | 107 | 102 | 106 |
| Sunny | 197 | 200 | 205 |
| Avg. July High | 85 | 85 | 86 |
| Avg. Jan. Low | 18 | 18 | 22 |
| Comfort Index (higher=better) | 7.2 | 7.2 | 7 |
| UV Index | 3.9 | 3.9 | 4.3 |
| Elevation | 600 | 558 | 2443 |