| | Martinsville, IL | Marshall, IL | United States |
| Rainfall | 43.4 | 42.9 | 38.1 |
| Snowfall | 14.2 | 21.1 | 27.8 |
| Precipitation Days | 107 | 115.1 | 106.2 |
| Sunny | 195 | 200 | 205 |
| Avg. July High | 87.1 | 86.4 | 85.8 |
| Avg. Jan. Low | 19.6 | 19.1 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.1 | 7 |
| UV Index | 3.9 | 3.9 | 4.3 |
| Elevation ft. | 610 | 636 | 2443 |