Currently: 20 °F. Clear. (Weather station: Great Falls International Airport, USA). See more current weatherAnnual 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