| | Mount Vernon, WA | Coupeville, WA | United States |
| Rainfall | 38.1 | 20.3 | 38.1 |
| Snowfall | 5 | 3.7 | 27.8 |
| Precipitation Days | 165 | 138.1 | 106.2 |
| Sunny | 156 | 161 | 205 |
| Avg. July High | 72.8 | 70.7 | 85.8 |
| Avg. Jan. Low | 35.7 | 37.3 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.3 | 7 |
| UV Index | 2.6 | 2.7 | 4.3 |
| Elevation ft. | 98 | 82 | 2443 |