TODAY JUN20
TEMPERATURE56
HUMIDITY90
PRESSURE30.1
WIND COND.
  • 8757Thu
  • 8756Fri
  • 8355Sat
  • 8860Sun
  • 9258Mon
daynightWeather update from Ontario Municipal Airport at

Harper Average Weather

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
January-6°F53°F29°F0.6"
February9°F59°F34°F0.5"
March18°F72°F43°F1.2"
April19°F86°F50°F0.6"
May28°F96°F61°F1.1"
June37°F102°F68°F0.9"
July48°F108°F79°F0.1"
August41°F104°F74°F0.2"
September32°F98°F63°F0.4"
October14°F84°F49°F0.7"
November10°F73°F38°F1.0"
December-4°F58°F27°F1.7"

Did you know?

  • The highest monthly average temperature in Harper for July is 79 degrees.
  • The lowest monthly average temperature in Harper for December is 27 degrees.
  • The most monthly precipitation in Harper occurs in December with 1.7 inches.
  • The air quality index in Harper is 27% better than the national average.
  • The pollution index in Harper is 67% better than the national average.

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Harper 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.
IndexHarperOregonNational
Air quality index363250
Pollution index1,647,3105,374,5275,066,862

Harper air quality information

MeasurementTotal
Days measured365
Days with good air quality293
Days with moderate air quality60
Days w/ poor A.Q. for sensitive groups9
Days with unhealthy air quality3

Harper air quality information

PollutantTotal
Arsenic0.001%
Benzene0.010%
Carbon Tetrachloride0.002%
Lead0.001%
Mercury0.000%

Average monthly Harper temperature with heat index

Harper monthly precipitation with daily maximum

Harper monthly snow depth with daily maximum

Harper monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Harper, OR1123628%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
La Rose, IL112484%
Victoria Vera, TX1123628%
St. Paul, AR1123922%
Bear Creek, CA112548%
Addy, WA1123922%
Harper, OR1123628%
Source: The Harper, 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.