TODAY NOV02
TEMPERATURE48
HUMIDITY93
PRESSURE101220
WIND COND.330 5.4
  • 5544Sun50%20%
  • 5243Mon100%80%
  • 5338Tue60%
  • 5438Wed
  • 5639Thu
daynightWeather update from Portland-Hillsboro Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Cedar Mill for August is 67.5 degrees
  • The lowest monthly average temperature in Cedar Mill for December is 38.2 degrees
  • The most monthly precipitation in Cedar Mill occurs in December with 6 inches
  • The air quality index in Cedar Mill is 10% better than the national average
  • The pollution index in Cedar Mill is 19% worse than the national average

Compare Cedar Mill, OR Weather

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      Cedar Mill 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°F4.8"
      February34°F52°F42°F3.8"
      March37°F56°F46°F4.5"
      April39°F62°F50°F2.5"
      May44°F70°F56°F2.1"
      June49°F75°F61°F1.3"
      July52°F84°F67°F0.3"
      August52°F85°F68°F0.4"
      September48°F78°F62°F1.4"
      October42°F65°F52°F3.6"
      November37°F53°F45°F5.8"
      December32°F45°F38°F6.0"

      Cedar Mill 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.
      IndexCedar MillOregonNational
      Air quality index383242
      Pollution index3,247,5807,156,3562,726,193

      Cedar Mill air quality

      MeasurementTotal
      Days measured365
      Days with good air quality285
      Days with moderate air quality77
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.002%
      Benzene0.020%
      Carbon Tetrachloride0.500%
      Lead0.040%
      Mercury0.001%

      Average monthly Cedar Mill temperature with heat index

      Cedar Mill monthly precipitation with daily maximum

      Cedar Mill monthly snow depth with daily maximum

      Cedar Mill monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lake Shore, WA7,5813824.0%
      Vancouver, WA182,7923824.0%
      Meadow Glade, WA2,7743824.0%
      Cornelius, OR12,7673824.0%
      Hillsboro, OR108,0263824.0%
      Cedar Mill, OR18,6613824.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Petawawa, ON18,660n/a 
      Augusta, ME18,6622844.0%
      Homewood, IL18,6565510.0%
      Willimantic, CT18,6693334.0%
      Deux-Montagnes, QC18,650n/a 
      Cedar Mill, OR18,6613824.0%
      Source: The Cedar Mill, OR 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.