| | Estelline, SD | Roundup, MT | United States |
| Rainfall | 24.6 | 14.1 | 38.1 |
| Snowfall | 37.6 | 32.9 | 27.8 |
| Precipitation Days | 86.1 | 73.8 | 106.2 |
| Sunny | 208 | 198 | 205 |
| Avg. July High | 81.5 | 88.1 | 85.8 |
| Avg. Jan. Low | 2.1 | 13 | 21.7 |
| Comfort Index (higher=better) | 6.6 | 7 | 7 |
| UV Index | 3.5 | 3.8 | 4.3 |
| Elevation ft. | 1654 | 3215 | 2443 |