| | DeWitt, IA | Clinton, IA | United States |
| Rainfall | 35.9 | 35.2 | 38.1 |
| Snowfall | 28.2 | 29.1 | 27.8 |
| Precipitation Days | 105 | 105.3 | 106.2 |
| Sunny | 199 | 197 | 205 |
| Avg. July High | 83.7 | 85 | 85.8 |
| Avg. Jan. Low | 12 | 13.2 | 21.7 |
| Comfort Index (higher=better) | 6.9 | 7 | 7 |
| UV Index | 3.9 | 3.9 | 4.3 |
| Elevation ft. | 709 | 587 | 2443 |