| | Yelm, WA | Lewistown, MT | United States |
| Rainfall | 48.1 | 15.8 | 38.1 |
| Snowfall | 5.9 | 72.3 | 27.8 |
| Precipitation Days | 167.1 | 102.6 | 106.2 |
| Sunny | 139 | 196 | 205 |
| Avg. July High | 75.7 | 81 | 85.8 |
| Avg. Jan. Low | 35 | 13.5 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 6.5 | 7 |
| UV Index | 2.6 | 3.7 | 4.3 |
| Elevation ft. | 344 | 3947 | 2443 |