TODAY DEC22
TEMPERATURE
HUMIDITY100
PRESSURE
WIND COND.307 1.6
  • 3629Mon30%80%
  • 3119Tue60%20%
  • 322360%100%
  • 3026Thu90%70%
  • 3021Fri70%70%
daynightWeather update from NCSB at
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Weather Quick Facts

  • The highest monthly average temperature in Winthrop for July is 75.4 degrees
  • The lowest monthly average temperature in Winthrop for January is 23.9 degrees
  • The most monthly precipitation in Winthrop occurs in June with 4.2 inches
  • The air quality index in Winthrop is 43% better than the national average
  • The pollution index in Winthrop is 84% better than the national average

Compare Winthrop, WA Weather

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      Winthrop 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
      January18°F30°F24°F1.2"
      February25°F44°F33°F2.4"
      March31°F57°F43°F1.8"
      April35°F65°F50°F1.5"
      May42°F75°F59°F2.6"
      June49°F80°F64°F4.2"
      July58°F92°F75°F1.6"
      August54°F91°F73°F0.8"
      September45°F78°F61°F2.2"
      October37°F61°F48°F2.3"
      November27°F41°F34°F3.6"
      December18°F30°F25°F4.0"

      Winthrop 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.
      IndexWinthropWashingtonNational
      Air quality index243642
      Pollution index422,6264,541,8502,726,193

      Winthrop air quality

      MeasurementTotal
      Days measured365
      Days with good air quality298
      Days with moderate air quality66
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Air quality details

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

      Average monthly Winthrop temperature with heat index

      Winthrop monthly precipitation with daily maximum

      Winthrop monthly snow depth with daily maximum

      Winthrop monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Twisp, WA1,2352452.0%
      Winthrop, WA3402452.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      St. Michael, AK3403138.0%
      Cazadero, CA3403432.0%
      Chilcoot-Vinton, CA340468.0%
      St. Marks, FL3404020.0%
      Ryan, IA3403922.0%
      Winthrop, WA3402452.0%
      Source: The Winthrop, 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.