Weather in the Islands, Washington State
Weather in the Islands
Washington State Tourist Information and Travel Guide
The weather on the San Juan Islands and the islands to the south is often wet and cool during the winter months and warm and sunny in the summertime.
Average daily temperatures at Friday Harbor on San Juan Island are as follows:
| Month | Minimum | Maximum | Precipitation |
| Jan | 36 | 47 | 3.9 |
| April | 41 | 58 | 2.3 |
| July | 51 | 71 | 0.8 |
| Oct | 44 | 59 | 2.3 |
Weather in the Islands, Washington State
It is not uncommon to have fog over the islands in the mornings. It normally burns off by 10:00 AM.
