TODAY DEC18
TEMPERATURE50
HUMIDITY86
PRESSURE100920
WIND COND.130 20.5
  • 5343Wed
  • 5345Thu60%70%
  • 5545Fri20%30%
  • 5546Sat
  • 5446Sun
daynightWeather update from Friday Harbor Airport at
New Real Estate Listings in Friday Harbor Area
Search Homes for Sale in Friday Harbor, WA

Weather Quick Facts

  • The highest monthly average temperature in Friday Harbor for August is 59.9 degrees
  • The lowest monthly average temperature in Friday Harbor for December is 40.3 degrees
  • The most monthly precipitation in Friday Harbor occurs in November with 2.4 inches
  • The air quality index in Friday Harbor is 19% better than the national average
  • The pollution index in Friday Harbor is 82% better than the national average

Compare Friday Harbor, WA Weather

      vs
      How would you rate the weather in Friday Harbor?
      Write a review to give others more information about this area.
      How would you rate the air quality in Friday Harbor?
      Write a review to give others more information about this area.
      See all Friday Harbor poll results

      Friday Harbor Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January36°F46°F41°F2.2"
      February36°F49°F42°F1.4"
      March38°F53°F45°F1.3"
      April40°F57°F48°F0.9"
      May43°F64°F52°F0.9"
      June47°F68°F57°F0.4"
      July49°F74°F60°F0.2"
      August49°F74°F60°F0.4"
      September48°F69°F57°F1.0"
      October44°F59°F51°F1.7"
      November39°F51°F45°F2.4"
      December35°F45°F40°F2.0"

      Friday Harbor air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexFriday HarborWashingtonNational
      Air quality index343642
      Pollution index480,9254,541,8502,726,193

      Friday Harbor air quality

      MeasurementTotal
      Days measured365
      Days with good air quality277
      Days with moderate air quality78
      Days w/ poor A.Q. for sensitive groups10
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.040%
      Mercury0.000%

      Average monthly Friday Harbor temperature with heat index

      Friday Harbor monthly precipitation with daily maximum

      Friday Harbor monthly snow depth with daily maximum

      Friday Harbor monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Friday Harbor, WA2,4063432.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Fulton, KY2,4054412.0%
      Saint-Léonard-d'Aston, QC2,405n/a 
      Nice, CA2,4073138.0%
      Marengo, IA2,4073922.0%
      Rineyville, KY2,4073922.0%
      Friday Harbor, WA2,4063432.0%
      Source: The Friday Harbor, WA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.