| | Mark, IL | Gilberts, IL | United States |
| Rainfall | 37.9 | 38.1 | 38.1 |
| Snowfall | 22.4 | 32.7 | 27.8 |
| Precipitation Days | 102.8 | 120.3 | 106.2 |
| Sunny | 194 | 188 | 205 |
| Avg. July High | 85.5 | 83.9 | 85.8 |
| Avg. Jan. Low | 14.4 | 12.4 | 21.7 |
| Comfort Index (higher=better) | 7 | 6.8 | 7 |
| UV Index | 3.6 | 3.5 | 4.3 |
| Elevation ft. | 692 | 899 | 2443 |