TODAY MAR28
TEMPERATURE31
HUMIDITY92
PRESSURE100610
WIND COND.293
  • 5232Fri
  • 5635Sat
  • 6038Sun
  • 6743Mon
  • 6738Tue
daynightWeather update from W7YKM-3 Tieton at
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Weather Quick Facts

  • The highest monthly average temperature in Cowiche for July is 75.7 degrees
  • The lowest monthly average temperature in Cowiche for December is 29 degrees
  • The most monthly precipitation in Cowiche occurs in December with 1.5 inches
  • The air quality index in Cowiche is 10% better than the national average
  • The pollution index in Cowiche is 58% better than the national average

Compare Cowiche, WA Weather

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      Cowiche 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
      January22°F41°F31°F1.1"
      February25°F50°F37°F0.8"
      March30°F59°F44°F0.8"
      April34°F67°F51°F0.5"
      May42°F77°F60°F1.0"
      June48°F83°F67°F0.4"
      July55°F93°F76°F0.1"
      August53°F92°F73°F0.2"
      September44°F82°F63°F0.4"
      October36°F67°F50°F0.8"
      November27°F52°F39°F0.9"
      December20°F40°F29°F1.5"

      Cowiche 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.
      IndexCowicheWashingtonNational
      Air quality index383642
      Pollution index1,140,9804,541,8502,726,193

      Cowiche air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality227
      Days with moderate air quality128
      Days w/ poor A.Q. for sensitive groups10
      Days with unhealthy air quality0

      Cowiche air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.020%
      Carbon Tetrachloride0.001%
      Lead0.000%
      Mercury0.000%

      Average monthly Cowiche temperature with heat index

      Cowiche monthly precipitation with daily maximum

      Cowiche monthly snow depth with daily maximum

      Cowiche monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Nile, WA902354.0%
      Gleed, WA3,0063824.0%
      Summitview, WA1,8923824.0%
      Union Gap, WA6,1673824.0%
      Ahtanum, WA3,7013824.0%
      Cowiche, WA6623824.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      McDonald Chapel, AL662536.0%
      Bluford, IL6624314.0%
      Millington, IL6620100.0%
      Fairland, IN662548.0%
      Elgin, ND6623334.0%
      Cowiche, WA6623824.0%
      Source: The Cowiche, 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.