| | Sultan, WA | Richland, WA | United States |
| Rainfall | 52.4 | 8.1 | 38.1 |
| Snowfall | 3 | 3.6 | 27.8 |
| Precipitation Days | 178.1 | 82.8 | 106.2 |
| Sunny | 164 | 196 | 205 |
| Avg. July High | 75.7 | 89.9 | 85.8 |
| Avg. Jan. Low | 34.4 | 28.7 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.5 | 7 |
| UV Index | 2.7 | 3.2 | 4.3 |
| Elevation ft. | 108 | 384 | 2443 |