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Friday Harbor, WA Weather


Friday Harbor, WA climate is cool during summer when temperatures tend to be in the 50's and cold during winter when temperatures tend to be in the 40's.

The warmest month of the year is August with an average maximum temperature of 70.10 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 33.70 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 21 degrees Fahrenheit, and fairly limited during winter with an average difference of 12 degrees Fahrenheit.

The annual average precipitation at Friday Harbor is 28.16 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is November with an average rainfall of 4.38 Inches.

Weather Data

Moon, Sunrise and Sunset

New Moon Moon Phase: New Moon Civil Twilight:
7:23 AM PST
Sunrise:
8:00 AM PST
Sunset:
4:17 PM PST
Civil Twilight:
4:54 PM PST

Normal Climate

Normal Temperatures

(OLGA 2 SE Weather station, 11.51 miles from Friday Harbor)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 44.7 47.7 51.9 56.9 62.3 66.3 69.8 70.1 66.3 57.6 49.6 45.1 57.4
Mean °F 39.2 41.6 44.7 48.4 52.9 56.5 59.5 59.9 56.8 50.2 43.9 39.8 49.5
Min °F 33.7 35.5 37.4 39.9 43.5 46.7 49.1 49.7 47.3 42.8 38.1 34.5 41.5

Normal Precipitation

(OLGA 2 SE Weather station, 11.51 miles from Friday Harbor)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 3.86 2.79 2.27 1.89 1.72 1.40 0.94 1.06 1.34 2.42 4.38 4.09 28.16