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Key findings

  • The highest monthly average temperature in Custer for July is 64.4 degrees
  • The lowest monthly average temperature in Custer for December is 39 degrees
  • The most monthly precipitation in Custer occurs in January with 7.4 inches
  • The air quality index in Custer is 32% better than the national average
  • The pollution index in Custer is 82% better than the national average

Compare Custer, WA Weather

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      Custer 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°F47°F41°F7.4"
      February37°F50°F42°F3.8"
      March40°F54°F46°F5.8"
      April43°F58°F50°F2.8"
      May48°F65°F56°F2.9"
      June53°F68°F60°F1.8"
      July56°F73°F64°F1.0"
      August56°F73°F64°F1.4"
      September52°F68°F59°F3.2"
      October46°F60°F52°F5.3"
      November40°F51°F45°F6.7"
      December34°F45°F39°F6.3"

      Custer 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.
      IndexCusterWashingtonNational
      Air quality index343650
      Pollution index480,9254,541,8502,726,193

      Custer air quality information

      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

      Custer air quality information

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

      Average monthly Custer temperature with heat index

      Custer monthly precipitation with daily maximum

      Custer monthly snow depth with daily maximum

      Custer monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lynden, WA13,2043432.0%
      Everson, WA2,5553432.0%
      Marietta-Alderwood, WA4,4923432.0%
      Geneva, WA2,6303432.0%
      Bellingham, WA84,4623432.0%
      Custer, WA4483432.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Angoon, AK4482060.0%
      Lake View, AR4484314.0%
      Alta, CA4484412.0%
      Yolo, CA448524.0%
      Siloam, GA4484412.0%
      Custer, WA4483432.0%
      Source: The Custer, 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.