| | Charleston, IL | Chattanooga, TN | United States |
| Rainfall | 40.3 | 51.1 | 38.1 |
| Snowfall | 15.1 | 1.5 | 27.8 |
| Precipitation Days | 111.3 | 99 | 106.2 |
| Sunny | 202 | 207 | 205 |
| Avg. July High | 86.2 | 89 | 85.8 |
| Avg. Jan. Low | 20.2 | 28.9 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.5 | 7 |
| UV Index | 4.1 | 4.7 | 4.3 |
| Elevation ft. | 673 | 676 | 2443 |