| | Olney, IL | Effingham, IL | United States |
| Rainfall | 45 | 42.4 | 38.1 |
| Snowfall | 12.3 | 15.7 | 27.8 |
| Precipitation Days | 109 | 108.1 | 106.2 |
| Sunny | 202 | 196 | 205 |
| Avg. July High | 86.5 | 87.2 | 85.8 |
| Avg. Jan. Low | 20.3 | 19.7 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.1 | 7 |
| UV Index | 4.4 | 4 | 4.3 |
| Elevation ft. | 479 | 597 | 2443 |