Friday Harbor, WA
Climate overview — based on NOAA 1991-2020 normals from FRIDAY HARBOR AP, WA US.
Year-round temperatures (°F)
Climate summary
Friday Harbor has an annual average temperature of 50.9°F with about 18.5 inches of precipitation per year. The warmest month is August (average high 73.3°F), and the coldest is February (average low 36.5°F). November is typically the wettest month (2.98 in) and July the driest (0.48 in).
Best time to visit Friday Harbor
Full guide →Climate change signal
All-time records →223 of 366 (60.9%) of Friday Harbor's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1990s | 12 | |
| 2000s | 87 | |
| 2010s | 148 | |
| 2020s | 119 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 47.1°F | 37.1°F | 42.1°F | 2.69 in | — | 17 |
| February | 48.5°F | 36.5°F | 42.5°F | 1.54 in | — | 14 |
| March | 52.6°F | 38.4°F | 45.5°F | 1.35 in | — | 14 |
| April | 57.4°F | 40.7°F | 49.1°F | 1.01 in | — | 10 |
| May | 63.7°F | 44.3°F | 54.0°F | 1.14 in | — | 10 |
| June | 68.4°F | 48.1°F | 58.2°F | 0.75 in | — | 8 |
| July | 72.4°F | 50.0°F | 61.2°F | 0.48 in | — | 5 |
| August | 73.3°F | 50.0°F | 61.6°F | 0.70 in | — | 8 |
| September | 68.1°F | 47.9°F | 58.0°F | 1.04 in | — | 12 |
| October | 58.5°F | 44.0°F | 51.2°F | 2.34 in | — | 15 |
| November | 51.0°F | 39.8°F | 45.4°F | 2.98 in | — | 16 |
| December | 46.3°F | 36.8°F | 41.6°F | 2.45 in | — | 16 |
Climate twins of Friday Harbor
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).