| | Ephrata, WA | Grand Coulee, WA | United States |
| Rainfall | 8.2 | 11.3 | 38.1 |
| Snowfall | 22.4 | 19.4 | 27.8 |
| Precipitation Days | 62.9 | 91.5 | 106.2 |
| Sunny | 192 | 194 | 205 |
| Avg. July High | 87.9 | 87 | 85.8 |
| Avg. Jan. Low | 23 | 21.7 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7 | 7 |
| UV Index | 3.2 | 3.2 | 4.3 |
| Elevation ft. | 1276 | 1470 | 2443 |