| | Mascoutah, IL | Carterville, IL | United States |
| Rainfall | 41.9 | 46.8 | 38.1 |
| Snowfall | 11.6 | 11.8 | 27.8 |
| Precipitation Days | 95 | 107.7 | 106.2 |
| Sunny | 199 | 203 | 205 |
| Avg. July High | 89.3 | 87.8 | 85.8 |
| Avg. Jan. Low | 22.1 | 22.9 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.2 | 7 |
| UV Index | 4.1 | 4.1 | 4.3 |
| Elevation ft. | 430 | 453 | 2443 |