| | Olney, IL | Charleston, SC | United States |
| Rainfall | 45 | 48.3 | 38.1 |
| Snowfall | 12.3 | 0.4 | 27.8 |
| Precipitation Days | 109 | 105.9 | 106.2 |
| Sunny | 202 | 209 | 205 |
| Avg. July High | 86.5 | 89.9 | 85.8 |
| Avg. Jan. Low | 20.3 | 39.3 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.2 | 7 |
| UV Index | 4.4 | 5.1 | 4.3 |
| Elevation ft. | 479 | 10 | 2443 |