Friday Harbor climate guide

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Temperature in Friday Harbor (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Friday Harbor7
8°C maximum daytime temperature in February in Friday Harbor8
10°C maximum daytime temperature in March in Friday Harbor10
13°C maximum daytime temperature in April in Friday Harbor13
16°C maximum daytime temperature in May in Friday Harbor16
19°C maximum daytime temperature in June in Friday Harbor19
21°C maximum daytime temperature in July in Friday Harbor21
21°C maximum daytime temperature in August in Friday Harbor21
18°C maximum daytime temperature in September in Friday Harbor18
14°C maximum daytime temperature in October in Friday Harbor14
9°C maximum daytime temperature in November in Friday Harbor9
7°C maximum daytime temperature in December in Friday Harbor7
Min temperature (night-time)
2°C minimum night-time temperature in January in Friday Harbor2
3°C minimum night-time temperature in February in Friday Harbor3
4°C minimum night-time temperature in March in Friday Harbor4
5°C minimum night-time temperature in April in Friday Harbor5
7°C minimum night-time temperature in May in Friday Harbor7
9°C minimum night-time temperature in June in Friday Harbor9
11°C minimum night-time temperature in July in Friday Harbor11
11°C minimum night-time temperature in August in Friday Harbor11
10°C minimum night-time temperature in September in Friday Harbor10
7°C minimum night-time temperature in October in Friday Harbor7
4°C minimum night-time temperature in November in Friday Harbor4
2°C minimum night-time temperature in December in Friday Harbor2
Sea temperature
7°C sea temperature in January in Friday Harbor7
7°C sea temperature in February in Friday Harbor7
8°C sea temperature in March in Friday Harbor8
9°C sea temperature in April in Friday Harbor9
10°C sea temperature in May in Friday Harbor10
12°C sea temperature in June in Friday Harbor12
13°C sea temperature in July in Friday Harbor13
13°C sea temperature in August in Friday Harbor13
12°C sea temperature in September in Friday Harbor12
10°C sea temperature in October in Friday Harbor10
9°C sea temperature in November in Friday Harbor9
8°C sea temperature in December in Friday Harbor8

Sunshine & Daylight in Friday Harbor

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Friday Harbor9
10 hours of daylight per day in February in Friday Harbor10
12 hours of daylight per day in March in Friday Harbor12
14 hours of daylight per day in April in Friday Harbor14
15 hours of daylight per day in May in Friday Harbor15
16 hours of daylight per day in June in Friday Harbor16
16 hours of daylight per day in July in Friday Harbor16
14 hours of daylight per day in August in Friday Harbor14
13 hours of daylight per day in September in Friday Harbor13
11 hours of daylight per day in October in Friday Harbor11
9 hours of daylight per day in November in Friday Harbor9
8 hours of daylight per day in December in Friday Harbor8

Rainfall in Friday Harbor

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
18 days with some rainfall in January in Friday Harbor18
16 days with some rainfall in February in Friday Harbor16
15 days with some rainfall in March in Friday Harbor15
13 days with some rainfall in April in Friday Harbor13
11 days with some rainfall in May in Friday Harbor11
9 days with some rainfall in June in Friday Harbor9
6 days with some rainfall in July in Friday Harbor6
6 days with some rainfall in August in Friday Harbor6
9 days with some rainfall in September in Friday Harbor9
14 days with some rainfall in October in Friday Harbor14
18 days with some rainfall in November in Friday Harbor18
19 days with some rainfall in December in Friday Harbor19
Average monthly rainfall (mm)
101 mm monthly rainfall in January in Friday Harbor101
72 mm monthly rainfall in February in Friday Harbor72
55 mm monthly rainfall in March in Friday Harbor55
40 mm monthly rainfall in April in Friday Harbor40
33 mm monthly rainfall in May in Friday Harbor33
28 mm monthly rainfall in June in Friday Harbor28
20 mm monthly rainfall in July in Friday Harbor20
26 mm monthly rainfall in August in Friday Harbor26
36 mm monthly rainfall in September in Friday Harbor36
66 mm monthly rainfall in October in Friday Harbor66
104 mm monthly rainfall in November in Friday Harbor104
113 mm monthly rainfall in December in Friday Harbor113

More climate for Friday Harbor

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Friday Harbor1
UV (maximum) index 1 (Low) in February in Friday Harbor1
UV (maximum) index 3 (Moderate) in March in Friday Harbor3
UV (maximum) index 4 (Moderate) in April in Friday Harbor4
UV (maximum) index 6 (High) in May in Friday Harbor6
UV (maximum) index 7 (High) in June in Friday Harbor7
UV (maximum) index 7 (High) in July in Friday Harbor7
UV (maximum) index 6 (High) in August in Friday Harbor6
UV (maximum) index 5 (Moderate) in September in Friday Harbor5
UV (maximum) index 2 (Low) in October in Friday Harbor2
UV (maximum) index 1 (Low) in November in Friday Harbor1
UV (maximum) index 1 (Low) in December in Friday Harbor1
Heat & Humidity
No heat & humidity in January in Friday Harbor0
No heat & humidity in February in Friday Harbor0
No heat & humidity in March in Friday Harbor0
No heat & humidity in April in Friday Harbor0
No heat & humidity in May in Friday Harbor0
No heat & humidity in June in Friday Harbor0
No heat & humidity in July in Friday Harbor0
No heat & humidity in August in Friday Harbor0
No heat & humidity in September in Friday Harbor0
No heat & humidity in October in Friday Harbor0
No heat & humidity in November in Friday Harbor0
No heat & humidity in December in Friday Harbor0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

What's the climate like in Friday Harbor?

Friday Harbor has a temperate climate with warm dry summers.

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The climate guide for Friday Harbor, Washington shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Metric (°C / mm)  |  Imperial (°F / inches)

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Below are average maximum temperatures at popular destinations in Washington for next month - August. Select a destination to see the climate guide for all months of the year.

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