Weather information for the Olympic NP area is provided below. Average temperatures, climate details and current forecasts are included.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 44 | 48 | 54 | 58 | 65 | 70 | 76 | 77 | 71 | 60 | 50 | 44 |
| Avg. Low | 31 | 32 | 34 | 36 | 41 | 46 | 48 | 48 | 44 | 38 | 35 | 32 |
| Avg. Precip. | 8.0 | 5.8 | 5.0 | 3.3 | 2.1 | 1.6 | 0.8 | 1.3 | 2.3 | 4.3 | 8.1 | 8.1 |



