TODAY APR20
TEMPERATURE71
HUMIDITY25
PRESSURE101490
WIND COND.70 22.3
  • 6142Sat20%80%
  • 5437Sun70%
  • 6243Mon
  • 6243Tue
  • 5644Wed
daynightWeather update from Astoria, Astoria Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Deep River for August is 60.9 degrees
  • The lowest monthly average temperature in Deep River for December is 42.4 degrees
  • The most monthly precipitation in Deep River occurs in November with 12.7 inches
  • The air quality index in Deep River is 57% better than the national average
  • The pollution index in Deep River is 55% worse than the national average

Compare Deep River, WA Weather

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      Deep River 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°F51°F43°F10.5"
      February37°F53°F44°F6.7"
      March39°F55°F46°F9.5"
      April40°F57°F49°F6.0"
      May45°F63°F53°F4.1"
      June50°F66°F57°F2.4"
      July53°F69°F60°F1.0"
      August53°F71°F61°F0.8"
      September50°F70°F59°F3.3"
      October45°F63°F53°F7.4"
      November40°F55°F47°F12.7"
      December36°F49°F42°F11.3"

      Deep River 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.
      IndexDeep RiverWashingtonNational
      Air quality index183642
      Pollution index4,215,4104,541,8502,726,193

      Deep River air quality information

      MeasurementTotal
      Days measured360
      Days with good air quality338
      Days with moderate air quality22
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Deep River air quality information

      PollutantTotal
      Arsenic0.005%
      Benzene0.050%
      Carbon Tetrachloride0.004%
      Lead0.030%
      Mercury0.250%

      Average monthly Deep River temperature with heat index

      Deep River monthly precipitation with daily maximum

      Deep River monthly snow depth with daily maximum

      Deep River monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Chinook, WA1681864.0%
      Astoria, OR9,9291864.0%
      Rosburg, WA3201864.0%
      Jeffers Gardens, OR3121864.0%
      Altoona, WA351864.0%
      Deep River, WA1691864.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Vernon, AZ1694412.0%
      Farmington, CA1694510.0%
      Sisquoc, CA169468.0%
      Castalia, IA1693530.0%
      Admire, KS1692256.0%
      Deep River, WA1691864.0%
      Source: The Deep River, 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.