| | Garwin, IA | Altoona, IA | United States |
| Rainfall | 34.9 | 36 | 38.1 |
| Snowfall | 30.2 | 33.7 | 27.8 |
| Precipitation Days | 92.5 | 108.7 | 106.2 |
| Sunny | 190 | 201 | 205 |
| Avg. July High | 83.6 | 85.5 | 85.8 |
| Avg. Jan. Low | 9.6 | 12.2 | 21.7 |
| Comfort Index (higher=better) | 6.9 | 6.9 | 7 |
| UV Index | 3.8 | 4 | 4.3 |
| Elevation ft. | 922 | 955 | 2443 |