| | Zion, IL | Bellwood, IL | United States |
| Rainfall | 35.6 | 38.2 | 38.1 |
| Snowfall | 40.7 | 33.9 | 27.8 |
| Precipitation Days | 113.4 | 120.5 | 106.2 |
| Sunny | 192 | 188 | 205 |
| Avg. July High | 80.3 | 84 | 85.8 |
| Avg. Jan. Low | 15.7 | 16.5 | 21.7 |
| Comfort Index (higher=better) | 6.8 | 6.9 | 7 |
| UV Index | 3.7 | 3.6 | 4.3 |
| Elevation ft. | 646 | 633 | 2443 |