| | Clarksville, TN | Zion, IL | United States |
| Rainfall | 51 | 35.6 | 38.1 |
| Snowfall | 4.7 | 40.7 | 27.8 |
| Precipitation Days | 117 | 113.4 | 106.2 |
| Sunny | 210 | 192 | 205 |
| Avg. July High | 89.4 | 80.3 | 85.8 |
| Avg. Jan. Low | 26.5 | 15.7 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 6.8 | 7 |
| UV Index | 4.5 | 3.7 | 4.3 |
| Elevation ft. | 476 | 646 | 2443 |