Currently: 23 °F. Passing clouds. (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 1985–2015.
All Year Climate & Weather Averages in Great Falls
High Temp: 84 °F
Low Temp: 17 °F
Mean Temp: 46 °F
Precipitation: 0.60"
Humidity: 56%
Dew Point: 29 °F
Wind: 10 mph
Pressure: 30.01 "Hg
Visibility: 14 mi
January Climate & Weather Averages in Great Falls
High Temp: 37 °F
Low Temp: 17 °F
Mean Temp: 27 °F
Precipitation: 0.25"
Humidity: 63%
Dew Point: 15 °F
Wind: 13 mph
Pressure: 30.10 "Hg
Visibility: 13 mi
February Climate & Weather Averages in Great Falls
High Temp: 39 °F
Low Temp: 17 °F
Mean Temp: 28 °F
Precipitation: 0.29"
Humidity: 63%
Dew Point: 16 °F
Wind: 11 mph
Pressure: 30.11 "Hg
Visibility: 12 mi
March Climate & Weather Averages in Great Falls
High Temp: 47 °F
Low Temp: 24 °F
Mean Temp: 36 °F
Precipitation: 0.36"
Humidity: 59%
Dew Point: 21 °F
Wind: 10 mph
Pressure: 30.04 "Hg
Visibility: 13 mi
April Climate & Weather Averages in Great Falls
High Temp: 56 °F
Low Temp: 31 °F
Mean Temp: 43 °F
Precipitation: 0.82"
Humidity: 55%
Dew Point: 27 °F
Wind: 10 mph
Pressure: 29.99 "Hg
Visibility: 14 mi
May Climate & Weather Averages in Great Falls
High Temp: 65 °F
Low Temp: 39 °F
Mean Temp: 52 °F
Precipitation: 1.40"
Humidity: 56%
Dew Point: 35 °F
Wind: 8 mph
Pressure: 29.95 "Hg
Visibility: 15 mi
June Climate & Weather Averages in Great Falls
High Temp: 74 °F
Low Temp: 47 °F
Mean Temp: 60 °F
Precipitation: 1.44"
Humidity: 56%
Dew Point: 44 °F
Wind: 8 mph
Pressure: 29.90 "Hg
Visibility: 16 mi
July Climate & Weather Averages in Great Falls
High Temp: 84 °F
Low Temp: 52 °F
Mean Temp: 68 °F
Precipitation: 0.61"
Humidity: 45%
Dew Point: 45 °F
Wind: 7 mph
Pressure: 29.93 "Hg
Visibility: 16 mi
August Climate & Weather Averages in Great Falls
High Temp: 83 °F
Low Temp: 51 °F
Mean Temp: 67 °F
Precipitation: 0.55"
Humidity: 43%
Dew Point: 42 °F
Wind: 7 mph
Pressure: 29.94 "Hg
Visibility: 14 mi
September Climate & Weather Averages in Great Falls
High Temp: 72 °F
Low Temp: 43 °F
Mean Temp: 58 °F
Precipitation: 0.54"
Humidity: 50%
Dew Point: 37 °F
Wind: 8 mph
Pressure: 29.99 "Hg
Visibility: 14 mi
October Climate & Weather Averages in Great Falls
High Temp: 59 °F
Low Temp: 34 °F
Mean Temp: 46 °F
Precipitation: 0.39"
Humidity: 55%
Dew Point: 30 °F
Wind: 10 mph
Pressure: 30.05 "Hg
Visibility: 14 mi
November Climate & Weather Averages in Great Falls
High Temp: 45 °F
Low Temp: 25 °F
Mean Temp: 35 °F
Precipitation: 0.27"
Humidity: 60%
Dew Point: 21 °F
Wind: 13 mph
Pressure: 30.06 "Hg
Visibility: 13 mi
December Climate & Weather Averages in Great Falls
High Temp: 37 °F
Low Temp: 18 °F
Mean Temp: 28 °F
Precipitation: 0.25"
Humidity: 63%
Dew Point: 16 °F
Wind: 13 mph
Pressure: 30.11 "Hg
Visibility: 12 mi