Friday Harbor (WA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Friday Harbor.
Climate overview of Friday Harbor
Friday Harbor, Washington State, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 21°C (70°F) in August, while winters cool to 8°C (46°F) in December.
Annual rain/snowfall is moderate at around 671 mm (26 in), with November being the wettest month. The city also has a distinct dry season from May to August, with pleasant summers and cold winters. Sunshine peaks in July, when the city sees around 11.0 hours of sunshine per day.
Friday Harbor Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Friday Harbor - and find the best time to visit.
Monthly Temperature in Friday Harbor
Depending on the time of the year, temperatures range from pleasant to chilly in Friday Harbor. Average daytime temperatures reach a pleasant 21°C (70°F) in August. In December, the coolest month of the year, temperatures drop to a chilly 8°C (46°F).
At night, temperatures range from around 10°C (50°F) in August to 3°C (37°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Friday Harbor
Generally, Friday Harbor has a moderate amount of precipitation, averaging 671 mm (26 in) of rain/snowfall annually. Friday Harbor can be quite wet during November, receiving approximately 108 mm (4.3 in) of precipitation over 19 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 14 mm (0.6 in) of precipitation spread across 5 rainy days. For more details, please visit our Friday Harbor Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Friday Harbor
Friday Harbor can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 11.0 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Best Time to Visit Friday Harbor
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July and August
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July and August
- Wettest months: January, February, March, October, November and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from May to August, with pleasant summers and cold winters
Frequently asked questions about the climate in Friday Harbor
What is the best time to visit Friday Harbor?
June, July and August typically offer the most optimal weather in Friday Harbor. In contrast, January, February, March, November and December tend to have less optimal conditions. Friday Harbor has a distinct dry season from May to August, with pleasant summers and cold winters.
What temperatures can I expect in Friday Harbor?
Daytime highs range from 8°C (46°F) in December to 21°C (70°F) in August. Nighttime lows range from 3°C (37°F) to 10°C (50°F). Temperatures vary considerably through the year.
How much rain does Friday Harbor get?
Annual rainfall is around 671 mm (26 in). November is the wettest month with 108 mm (4.3 in), while July is the driest with 14 mm (0.6 in).
How sunny is Friday Harbor?
Friday Harbor receives around 2,221 hours of sunshine per year. July is the sunniest month with 331 hours, while December is the cloudiest with just 68 hours. Overall, Friday Harbor enjoys abundant sunshine.
Friday Harbor 3-Day Forecast
Friday Harbor (WA) 3-Day Forecast
Friday Harbor on the map
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