Mid-July to mid-August. WeatherSpark identifies mid-July to mid-August as the optimal window for warm-weather activities, with the highest tourism comfort scores peaking in the final week of July. Warmest average highs (~63°F), peak salmon runs, all tours available, long daylight, and the Blueberry Arts Festival in early August add a cultural anchor
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 39 | 33 | crisp & wet |
| Feb | 40 | 32 | crisp & wet |
| Mar | 42 | 34 | crisp & wet |
| Apr | 48 | 38 | cool & wet |
| May | 56 | 46 | cool & wet |
| Jun | 61 | 50 | mild & wet |
| Jul | 64 | 54 | mild & wet |
| Aug | 64 | 55 | mild & wet |
| Sep | 59 | 51 | cool & wet |
| Oct | 51 | 44 | cool & wet |
| Nov | 43 | 37 | crisp & wet |
| Dec | 38 | 33 | crisp & wet |