TODAY NOV22
TEMPERATURE43
HUMIDITY76
PRESSURE100810
WIND COND.30 24.1
  • 5444Fri100%80%
  • 5041Sat70%90%
  • 4736Sun70%60%
  • 4735Mon
  • 4637Tue
daynightWeather update from Bellingham, Bellingham International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Marietta-Alderwood for July is 63.3 degrees
  • The lowest monthly average temperature in Marietta-Alderwood for December is 38.5 degrees
  • The most monthly precipitation in Marietta-Alderwood occurs in November with 5.2 inches
  • The air quality index in Marietta-Alderwood is 19% better than the national average
  • The pollution index in Marietta-Alderwood is 82% better than the national average

Compare Marietta-Alderwood, WA Weather

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      Marietta-Alderwood 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
      January33°F46°F39°F4.4"
      February35°F50°F41°F3.0"
      March38°F53°F45°F4.1"
      April41°F58°F49°F2.9"
      May46°F65°F55°F2.3"
      June51°F69°F59°F1.6"
      July54°F74°F63°F0.7"
      August54°F75°F63°F0.9"
      September49°F69°F58°F2.1"
      October43°F60°F51°F4.0"
      November38°F51°F44°F5.2"
      December33°F45°F38°F4.2"

      Marietta-Alderwood 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.
      IndexMarietta-AlderwoodWashingtonNational
      Air quality index343642
      Pollution index480,9254,541,8502,726,193

      Marietta-Alderwood 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 Marietta-Alderwood temperature with heat index

      Marietta-Alderwood monthly precipitation with daily maximum

      Marietta-Alderwood monthly snow depth with daily maximum

      Marietta-Alderwood monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Bellingham, WA90,8213432.0%
      Blaine, WA5,4273432.0%
      Everson, WA2,7733432.0%
      Sumas, WA1,4053432.0%
      Ferndale, WA14,5913432.0%
      Marietta-Alderwood, WA3,4633432.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Poteet, TX3,462492.0%
      Riverton, IL3,4644020.0%
      Fairchild AFB, WA3,4644314.0%
      Union Springs, AL3,465524.0%
      High Bridge, NJ3,4603432.0%
      Marietta-Alderwood, WA3,4633432.0%
      Source: The Marietta-Alderwood, 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.