TODAY APR13
TEMPERATURE46
HUMIDITY35
PRESSURE30.05
WIND COND.
  • 5629Tue
  • 5632Wed
  • 6134Thu
  • 6737Fri
  • 7339Sat
daynightWeather update from Grant County Regional Airport at

Key findings

  • The highest monthly average temperature in John Day for July is 73.2 degrees
  • The lowest monthly average temperature in John Day for December is 32.4 degrees
  • The most monthly precipitation in John Day occurs in May with 2.7 inches
  • The air quality index in John Day is 60% better than the national average
  • The pollution index in John Day is 32% better than the national average

Compare John Day, OR Weather

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      John Day 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
      January28°F43°F34°F1.8"
      February30°F47°F38°F1.0"
      March34°F54°F42°F1.4"
      April36°F59°F46°F1.7"
      May42°F68°F54°F2.7"
      June49°F77°F62°F2.4"
      July56°F90°F73°F2.0"
      August55°F88°F71°F2.1"
      September48°F80°F63°F1.7"
      October41°F64°F51°F2.1"
      November33°F50°F40°F1.4"
      December26°F40°F32°F1.2"

      John Day 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.
      IndexJohn DayOregonNational
      Air quality index203250
      Pollution index3,459,5405,374,5275,066,862

      John Day air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality344
      Days with moderate air quality21
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      John Day air quality information

      PollutantTotal
      Arsenic0.003%
      Benzene0.070%
      Carbon Tetrachloride0.010%
      Lead0.004%
      Mercury0.002%

      Average monthly John Day temperature with heat index

      John Day monthly precipitation with daily maximum

      John Day monthly snow depth with daily maximum

      John Day monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Canyon City, OR8052060%
      Mount Vernon, OR6012060%
      Prairie City, OR8682060%
      John Day, OR1,7212060%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Harwich Port, MA1,7213628%
      Bayou L'Ourse, LA1,7214118%
      Marble Hill, MO1,7214412%
      Le Grand, CA1,721484%
      East Millinocket, ME1,7223138%
      John Day, OR1,7212060%
      Source: The John Day, 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.