TODAY JUN24
TEMPERATURE59
HUMIDITY78
PRESSURE
WIND COND.230 10.3
  • 7655Sun30%
  • 8855Mon40%
  • 7448Tue
  • 7952Wed
  • 7752Thu
daynightWeather update from Great Falls, Great Falls International Airport at

Great Falls 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-31°F63°F27°F0.5"
February-25°F63°F28°F0.5"
March-13°F70°F35°F1.0"
April-8°F79°F42°F2.1"
May14°F90°F52°F2.1"
June31°F96°F60°F2.9"
July39°F104°F72°F1.0"
August39°F98°F67°F0.8"
September30°F95°F58°F1.6"
October4°F84°F45°F1.0"
November-20°F72°F37°F0.6"
December-26°F59°F24°F1.2"

Did you know?

  • The highest monthly average temperature in Great Falls for July is 72 degrees.
  • The lowest monthly average temperature in Great Falls for December is 24 degrees.
  • The most monthly precipitation in Great Falls occurs in June with 2.9 inches.
  • The air quality index in Great Falls is 47% better than the national average.
  • The pollution index in Great Falls is 95% better than the national average.

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Compare Great Falls, MT Weather To Other Cities

Great Falls 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.
IndexGreat FallsMontanaNational
Air quality index263450
Pollution index250,374685,9255,066,862

Great Falls air quality information

MeasurementTotal
Days measured337
Days with good air quality311
Days with moderate air quality26
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Great Falls air quality information

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

Average monthly Great Falls temperature with heat index

Great Falls monthly precipitation with daily maximum

Great Falls monthly snow depth with daily maximum

Great Falls monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Malmstrom AFB, MT3,9332648%
Ulm, MT5372648%
Sand Coulee, MT2302648%
Vaughn, MT8242648%
Black Eagle, MT1,0222648%
Great Falls, MT59,4792648%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Lakewood, WA59,4893138%
Moore, OK59,501476%
Georgetown, TX59,4364118%
Casper, WY59,3973922%
Lancaster, PA59,3414510%
Great Falls, MT59,4792648%
Source: The Great Falls, MT 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.