TODAY DEC18
TEMPERATURE45
HUMIDITY76
PRESSURE29.92
WIND COND.
  • 4534Wed
  • 4731Thu30%50%
  • 4026Fri20%
  • 4028Sat20%
  • 4030Sun
daynightWeather update from Grant County Regional Airport at

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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"

Did you know?

  • The highest monthly average temperature in John Day for July is 73 degrees.
  • The lowest monthly average temperature in John Day for December is 32 degrees.
  • The most monthly precipitation in John Day occurs in May with 2.7 inches.
  • The air quality index in John Day is 33% better than the national average.
  • The pollution index in John Day is 31% better than the national average.

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Compare John Day, OR Weather To Other Cities

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 index333250
Pollution index3,459,5405,374,5275,066,862

John Day air quality information

MeasurementTotal
Days measured365
Days with good air quality275
Days with moderate air quality85
Days w/ poor A.Q. for sensitive groups5
Days with unhealthy air quality

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, OR8053334%
Mount Vernon, OR6013334%
Prairie City, OR8683334%
John Day, OR1,7213334%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Bayou L'Ourse, LA1,7213432%
Le Grand, CA1,721548%
Marble Hill, MO1,7213628%
Harwich Port, MA1,7213334%
Granby, CO1,7224216%
John Day, OR1,7213334%
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.