| | Johnston City, IL | Marion, IL | United States |
| Rainfall | 45.5 | 46.5 | 38.1 |
| Snowfall | 11.9 | 12 | 27.8 |
| Precipitation Days | 97.5 | 103.9 | 106.2 |
| Sunny | 204 | 208 | 205 |
| Avg. July High | 87.8 | 87.6 | 85.8 |
| Avg. Jan. Low | 23 | 22.8 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.2 | 7 |
| UV Index | 4.1 | 4.1 | 4.3 |
| Elevation ft. | 433 | 427 | 2443 |