| | Posen, IL | Harvey, IL | United States |
| Rainfall | 37.9 | 38.5 | 38.1 |
| Snowfall | 31.5 | 31.4 | 27.8 |
| Precipitation Days | 123.7 | 123.7 | 106.2 |
| Sunny | 187 | 187 | 205 |
| Avg. July High | 84.2 | 84.2 | 85.8 |
| Avg. Jan. Low | 18.2 | 18.2 | 21.7 |
| Comfort Index (higher=better) | 7 | 7 | 7 |
| UV Index | 3.6 | 3.6 | 4.3 |
| Elevation ft. | 600 | 604 | 2443 |