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Climate & Weather Averages in Great Falls, Montana, USA

Currently: 50 °F. Mostly cloudy. (Weather station: Great Falls International Airport, USA). See more current weather

Annual Weather Averages Near Great Falls

Averages are for Great Falls International Airport, which is 4 miles from Great Falls.

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in Great Falls

High Temp: 85 °F

Low Temp: 16 °F

Mean Temp: 45 °F

Precipitation: 1.24"

Humidity: 56%

Dew Point: 29 °F

Wind: 18 mph

Pressure: 30.02 "Hg

Visibility: 10 mi

January Climate & Weather Averages in Great Falls

High Temp: 37 °F

Low Temp: 17 °F

Mean Temp: 27 °F

Precipitation: 0.56"

Humidity: 64%

Dew Point: 15 °F

Wind: 23 mph

Pressure: 30.11 "Hg

Visibility: 9 mi

February Climate & Weather Averages in Great Falls

High Temp: 37 °F

Low Temp: 16 °F

Mean Temp: 27 °F

Precipitation: 0.63"

Humidity: 64%

Dew Point: 15 °F

Wind: 20 mph

Pressure: 30.10 "Hg

Visibility: 9 mi

March Climate & Weather Averages in Great Falls

High Temp: 47 °F

Low Temp: 23 °F

Mean Temp: 35 °F

Precipitation: 0.69"

Humidity: 58%

Dew Point: 21 °F

Wind: 19 mph

Pressure: 30.05 "Hg

Visibility: 10 mi

April Climate & Weather Averages in Great Falls

High Temp: 55 °F

Low Temp: 31 °F

Mean Temp: 43 °F

Precipitation: 1.72"

Humidity: 56%

Dew Point: 27 °F

Wind: 17 mph

Pressure: 30.00 "Hg

Visibility: 10 mi

May Climate & Weather Averages in Great Falls

High Temp: 65 °F

Low Temp: 39 °F

Mean Temp: 52 °F

Precipitation: 2.52"

Humidity: 56%

Dew Point: 36 °F

Wind: 15 mph

Pressure: 29.96 "Hg

Visibility: 10 mi

June Climate & Weather Averages in Great Falls

High Temp: 73 °F

Low Temp: 46 °F

Mean Temp: 60 °F

Precipitation: 2.53"

Humidity: 56%

Dew Point: 43 °F

Wind: 14 mph

Pressure: 29.90 "Hg

Visibility: 11 mi

July Climate & Weather Averages in Great Falls

High Temp: 85 °F

Low Temp: 52 °F

Mean Temp: 68 °F

Precipitation: 1.23"

Humidity: 44%

Dew Point: 45 °F

Wind: 11 mph

Pressure: 29.93 "Hg

Visibility: 10 mi

August Climate & Weather Averages in Great Falls

High Temp: 83 °F

Low Temp: 51 °F

Mean Temp: 67 °F

Precipitation: 1.26"

Humidity: 42%

Dew Point: 42 °F

Wind: 12 mph

Pressure: 29.94 "Hg

Visibility: 10 mi

September Climate & Weather Averages in Great Falls

High Temp: 72 °F

Low Temp: 43 °F

Mean Temp: 58 °F

Precipitation: 1.31"

Humidity: 49%

Dew Point: 37 °F

Wind: 14 mph

Pressure: 29.98 "Hg

Visibility: 10 mi

October Climate & Weather Averages in Great Falls

High Temp: 58 °F

Low Temp: 34 °F

Mean Temp: 46 °F

Precipitation: 1.10"

Humidity: 56%

Dew Point: 30 °F

Wind: 19 mph

Pressure: 30.04 "Hg

Visibility: 10 mi

November Climate & Weather Averages in Great Falls

High Temp: 45 °F

Low Temp: 25 °F

Mean Temp: 35 °F

Precipitation: 0.68"

Humidity: 60%

Dew Point: 21 °F

Wind: 23 mph

Pressure: 30.07 "Hg

Visibility: 9 mi

December Climate & Weather Averages in Great Falls

High Temp: 37 °F

Low Temp: 17 °F

Mean Temp: 27 °F

Precipitation: 0.58"

Humidity: 64%

Dew Point: 15 °F

Wind: 23 mph

Pressure: 30.10 "Hg

Visibility: 9 mi

Quick Climate Info

Hottest MonthJuly (68 °F avg)
Coldest MonthFebruary (27 °F avg)
Wettest MonthJune (2.53" avg)
Windiest MonthNovember (23 mph avg)
Annual precip.14.82" (per year)

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