TODAY MAR29
TEMPERATURE48
HUMIDITY66
PRESSURE100850
WIND COND.210 24.1
  • 5639Fri30%
  • 5938Sat
  • 6041Sun
  • 6244Mon
  • 6343Tue
daynightWeather update from Tacoma / McChord Air Force Base at
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Weather Quick Facts

  • The highest monthly average temperature in Steilacoom for July is 65.3 degrees
  • The lowest monthly average temperature in Steilacoom for December is 38.2 degrees
  • The most monthly precipitation in Steilacoom occurs in November with 8.2 inches
  • The air quality index in Steilacoom is 29% better than the national average
  • The pollution index in Steilacoom is 146% worse than the national average

Compare Steilacoom, WA Weather

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      Steilacoom 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°F47°F39°F7.4"
      February33°F51°F41°F4.9"
      March36°F55°F44°F6.1"
      April38°F60°F48°F4.0"
      May44°F67°F55°F4.5"
      June49°F72°F60°F3.0"
      July52°F80°F65°F1.5"
      August52°F80°F65°F3.4"
      September48°F73°F60°F4.4"
      October42°F62°F51°F6.3"
      November36°F52°F44°F8.2"
      December32°F46°F38°F6.9"

      Steilacoom 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.
      IndexSteilacoomWashingtonNational
      Air quality index303642
      Pollution index6,704,3304,541,8502,726,193

      Steilacoom air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality323
      Days with moderate air quality42
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Steilacoom air quality information

      PollutantTotal
      Arsenic0.003%
      Benzene0.100%
      Carbon Tetrachloride0.004%
      Lead0.030%
      Mercury0.003%

      Average monthly Steilacoom temperature with heat index

      Steilacoom monthly precipitation with daily maximum

      Steilacoom monthly snow depth with daily maximum

      Steilacoom monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Canterwood, WA3,0701864.0%
      Maplewood, WA5,1351864.0%
      Grapeview, WA7031864.0%
      Vaughn, WA1,0521864.0%
      Raft Island, WA4161864.0%
      Steilacoom, WA6,3663040.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Fowler, CA6,3666020.0%
      Gray, LA6,3664118.0%
      Hamlet, NC6,3663040.0%
      Brunswick, MD6,3644020.0%
      Air Force Academy, CO6,3684510.0%
      Steilacoom, WA6,3663040.0%
      Source: The Steilacoom, 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.