| | Mokena, IL | Jefferson, MD | United States |
| Rainfall | 40.1 | 42.4 | 38.1 |
| Snowfall | 29.8 | 19.4 | 27.8 |
| Precipitation Days | 123.3 | 110.6 | 106.2 |
| Sunny | 187 | 197 | 205 |
| Avg. July High | 84 | 87.5 | 85.8 |
| Avg. Jan. Low | 16 | 23 | 21.7 |
| Comfort Index (higher=better) | 6.9 | 7.3 | 7 |
| UV Index | 3.7 | 4.2 | 4.3 |
| Elevation ft. | 705 | 581 | 2443 |