| | Roundup, MT | Plains, MT | United States |
| Rainfall | 14.1 | 18.9 | 38.1 |
| Snowfall | 32.9 | 39.4 | 27.8 |
| Precipitation Days | 73.8 | 129.5 | 106.2 |
| Sunny | 198 | 154 | 205 |
| Avg. July High | 88.1 | 86 | 85.8 |
| Avg. Jan. Low | 13 | 20.9 | 21.7 |
| Comfort Index (higher=better) | 7 | 6.6 | 7 |
| UV Index | 3.8 | 3.2 | 4.3 |
| Elevation ft. | 3215 | 2470 | 2443 |