| | Greenfield, IA | Afton, IA | United States |
| Rainfall | 35.3 | 36.1 | 38.1 |
| Snowfall | 24.8 | 27.7 | 27.8 |
| Precipitation Days | 95.1 | 90.5 | 106.2 |
| Sunny | 199 | 202 | 205 |
| Avg. July High | 85.2 | 84.5 | 85.8 |
| Avg. Jan. Low | 12.8 | 12 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7 | 7 |
| UV Index | 3.6 | 3.8 | 4.3 |
| Elevation ft. | 1375 | 1234 | 2443 |