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Grand Coulee 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
January18°F30°F24°F1.2"
February25°F44°F33°F2.4"
March31°F57°F43°F1.8"
April35°F65°F50°F1.5"
May42°F75°F59°F2.6"
June49°F80°F64°F4.2"
July58°F92°F75°F1.6"
August54°F91°F73°F0.8"
September45°F78°F61°F2.2"
October37°F61°F48°F2.3"
November27°F41°F34°F3.6"
December18°F30°F25°F4.0"

Did you know?

  • The highest monthly average temperature in Grand Coulee for July is 75 degrees.
  • The lowest monthly average temperature in Grand Coulee for January is 24 degrees.
  • The most monthly precipitation in Grand Coulee occurs in June with 4.2 inches.
  • The air quality index in Grand Coulee is 52% better than the national average.
  • The pollution index in Grand Coulee is 47% better than the national average.

Compare Grand Coulee, WA Weather To Other Cities

Grand Coulee 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.
IndexGrand CouleeWashingtonNational
Air quality index243650
Pollution index2,683,4108,596,9895,066,862

Grand Coulee air quality information

MeasurementTotal
Days measured337
Days with good air quality294
Days with moderate air quality43
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Grand Coulee air quality information

PollutantTotal
Arsenic0.000%
Benzene0.040%
Carbon Tetrachloride0.004%
Lead0.030%
Mercury0.000%

Average monthly Grand Coulee temperature with heat index

Grand Coulee monthly precipitation with daily maximum

Grand Coulee monthly snow depth with daily maximum

Grand Coulee monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Electric City, WA8382452%
Elmer City, WA3192452%
Coulee Dam, WA1,3132452%
Wilbur, WA7802452%
Keller, WA2193922%
Grand Coulee, WA9822452%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Cape Charles, VA9823922%
Thaxton, MS9823530%
Western Lake, TX9823334%
Benton, PA9823138%
Malvern, IA982484%
Grand Coulee, WA9822452%
Source: The Grand Coulee, 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.
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