| | Zillah, WA | Centralia, WA | United States |
| Rainfall | 8 | 49.6 | 38.1 |
| Snowfall | 16 | 5.6 | 27.8 |
| Precipitation Days | 65.6 | 166.7 | 106.2 |
| Sunny | 202 | 136 | 205 |
| Avg. July High | 89.4 | 77.8 | 85.8 |
| Avg. Jan. Low | 24.8 | 34.7 | 21.7 |
| Comfort Index (higher=better) | 7.4 | 7.2 | 7 |
| UV Index | 2.6 | 2.5 | 4.3 |
| Elevation ft. | 817 | 187 | 2443 |