Friday Harbor (WA) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Friday Harbor

Friday Harbor average temperature chart (Celsius) Friday Harbor average temperature chart (Fahrenheit)
Average monthly temperatures in Friday Harbor (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.6 8.1 10.1 12.6 15.8 18.4 20.7 20.6 18 13.5 9.1 6.8
°F 43.9 46.6 50.2 54.6 60.4 65.2 69.2 69.1 64.4 56.3 48.4 44.2

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Friday Harbor monthly rainfall chart (mm) Friday Harbor monthly rainfall chart (inches)
Average monthly rainfall in Friday Harbor (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 101 72 55 40 33 28 20 26 36 66 104 113
inches 4 2.8 2.1 1.6 1.3 1.1 0.8 1 1.4 2.6 4.1 4.4
Rainy days 18 16 15 13 11 9 6 6 9 14 18 19

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Friday Harbor

Friday Harbor average daily sunshine chart
Average daily sunshine Friday Harbor
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2.2 3.6 4.9 6.5 8.3 9 10.7 9.7 7.2 4.6 2.6 2.1

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Friday Harbor average minimum / maximum temperatures (Celsius) Friday Harbor average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Friday Harbor (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.9 2.8 3.6 5.1 7.2 9.4 10.7 11 9.6 7 4.2 2.3
Max °C 6.7 8.3 10.3 12.8 16 18.7 20.9 20.9 18.2 13.7 9.3 6.9
Min °F 35.4 37 38.4 41.1 45 48.8 51.3 51.7 49.3 44.5 39.5 36.1
Max °F 39.7 41.9 44.4 48 52.9 57.2 60.4 60.6 57 50.5 44.1 40.3

Sea temperature

The graph below shows the average sea temperature.

Friday Harbor average sea temperature chart (Celsius) Friday Harbor average sea temperature chart (Fahrenheit)
Average sea temperature around Friday Harbor in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.7 7.7 8.3 9.6 11.7 13.3 14.1 14.1 13 11 9.5 8.3
°F 45.9 45.8 46.9 49.3 53 56 57.4 57.3 55.4 51.7 49 47

Wind speed

The graph below shows the average wind speed.

Friday Harbor average winspeed by month (km/h) Friday Harbor average winspeed by month (mph)
Average wind speed in Friday Harbor (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 15 14 13 12 12 12 11 11 12 16 16
mph 10 9 9 8 7 7 7 7 7 7 10 10

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Friday Harbor relative humidity averages
Average relative humidity in Friday Harbor
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
85% 83% 79% 75% 74% 73% 73% 75% 79% 85% 86% 86%

Other monthly averages

UV index Best time to go?

Friday Harbor weather stats

Friday Harbor weather statistics
Hottest month: August 20.6°C 69.1°F
Driest month: July 20mm 0.8ins
Sunniest month: July 10.7hrs
Coldest month: January 6.6°C 43.9°F
Wettest month: December 113mm 4.4ins
Warmest sea: July 14.1°C 57.4°F
Map showing location of Friday Harbor (48.53427, -123.01712)

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