| | Castle Rock, WA | Skamokawa Valley, WA | United States |
| Rainfall | 60.8 | 96.8 | 38.1 |
| Snowfall | 3.1 | 3.9 | 27.8 |
| Precipitation Days | 181.2 | 186.7 | 106.2 |
| Sunny | 139 | 126 | 205 |
| Avg. July High | 77.1 | 73.4 | 85.8 |
| Avg. Jan. Low | 33.8 | 34.6 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 6.9 | 7 |
| UV Index | 3 | 2.9 | 4.3 |
| Elevation ft. | 56 | 646 | 2443 |