Great Falls Weather Records

Great Falls, Montana weather averages and records from 1892–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Great Falls, Montana was 107 °F which occurred on July 25, 1933.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Great Falls, Montana was -49 °F which occurred on February 15, 1936.
Lowest Temperatures: All-Time By Year
Great Falls Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 35.3 15.5 67 -44 0.5 9.1
February 37.0 15.9 70 -49 0.6 10.1
March 46.1 22.6 78 -32 0.7 10.1
April 54.9 30.4 89 -10 1.7 9.4
May 64.6 39.0 100 12 2.4 1.9
June 72.8 46.3 102 31 2.7 0.3
July 84.3 51.9 107 35 1.2 0.0
August 83.2 50.8 106 30 1.2 0.3
September 71.7 43.2 102 10 1.3 0.8
October 57.0 33.1 91 -11 1.1 5.1
November 43.7 24.0 76 -25 0.7 9.2
December 35.6 16.8 69 -43 0.5 9.2
Entire year 57.3 32.5 107 -49 14.7 66.2
More Great Falls Weather Records
1892–2024
Highest daily low 76 °F July 13, 1953
Lowest daily high -26 °F December 29, 1968
Greatest daily range
(Difference of high and low)
74 °F January 31, 1989
Greatest difference in daily high
over two conscutive days
71 °F Jan 31 – Feb 1, 1989
Most daily precipitation 3.4 inches June 23, 1907
Most monthly precipitation 8.1 inches May 1953
Most yearly precipitation 25.2 inches 1975
Most yearly days with precipitation 137 1975
Earliest snow in season August 22 1992
Latest snow in season June 12 1969
Most daily snow 16.5 inches April 20, 1973
Most monthly snow 35.4 inches April 2009
Most yearly snow 121.1 inches 2019
Most snow in a winter 117.5 inches 1988–1989
Greatest snow accumulation 24.0 inches April 9, 1975
Earliest freeze August 24 1992
Earliest day ≥ 80 °F April 7 1930
Earliest day ≥ 90 °F May 12 2001
Earliest day ≥ 100 °F May 28 1919
Latest freeze June 10 1999
Latest day ≥ 80 °F October 22 1915
Latest day ≥ 90 °F October 11 1934
Latest day ≥ 100 °F September 7 2022
Most days in a year < 0 °F 58 1916
Most days in a year < 32 °F 177 2000
Most days in a year ≥ 80 °F 105 1936
Most days in a year ≥ 90 °F 50 1919
Most days in a year ≥ 100 °F 8 2003
Great Falls Weather Streaks
Most consecutive days...
With precipitation 18 days May 17 – Jun 3, 1927
Without precipitation 62 days Oct 7 – Dec 7, 1907
With snow 12 days Dec 18–29, 1996
High temperature at or
below freezing
32 days Feb 3 – Mar 6, 2019
High temperature ≥ 80 °F 56 days Jul 9 – Sep 2, 1929
High temperature ≥ 90 °F 18 days Jul 30 – Aug 16, 1971
High temperature ≥ 100 °F 6 days Jul 21–26, 1931
Plant Hardiness Zone
4B
Great Falls is in plant hardiness zone 4B
based on average yearly minimum temperature from 1991–2020
Great Falls Weather by Year
More Great Falls Weather
Compare Great Falls to:
Weather Station Details
Years Station Coordinates
1937–2024 Great Falls International Airport location
1892–1937 Great Falls 16th Street location