| | Altamont, IL | Arthur, IL | United States |
| Rainfall | 42.3 | 40.8 | 38.1 |
| Snowfall | 14.7 | 12.7 | 27.8 |
| Precipitation Days | 107 | 100.4 | 106.2 |
| Sunny | 198 | 196 | 205 |
| Avg. July High | 87.1 | 85.7 | 85.8 |
| Avg. Jan. Low | 20.4 | 18.5 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.2 | 7 |
| UV Index | 4 | 3.9 | 4.3 |
| Elevation ft. | 620 | 663 | 2443 |