Great Falls, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 15° 36° -44° (1909) 67° (1992) 0.51" 8.5"
February 17° 38° -49° (1936) 84° (1892) 0.49" 8.3"
March 23° 46° -32° (1932) 80° (1892) 0.91" 11.9"
April 31° 56° -10° (1936) 89° (1980) 1.42" 8.6"
May 39° 65° 12° (2009) 100° (1919) 2.42" 2.8"
June 46° 73° 31° (1999) 102° (1919) 2.53" 0.3"
July 51° 84° 35° (1915) 107° (1933) 1.5" 0"
August 50° 82° 30° (1992) 106° (1969) 1.57" 0.3"
September 42° 70° 10° (1926) 100° (1893) 1.42" 1.2"
October 33° 58° -11° (1991) 91° (1992) 0.86" 4.1"
November 23° 43° -25° (1985) 83° (1892) 0.59" 8.1"
December 15° 35° -43° (1968) 69° (1939) 0.55" 9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 47° 77° 34° (1930) 97° (1967) 0.05" 0"
Sep 2 46° 76° 33° (1962) 96° (1969) 0.05" 0"
Sep 3 46° 76° 34° (1956) 95° (1978) 0.06" 0"
Sep 4 46° 75° 33° (1929) 100° (1893) 0.06" 0.1"
Sep 5 45° 75° 31° (1956) 98° (1967) 0.05" 0"
Sep 6 45° 74° 27° (1929) 98° (1980) 0.06" 0"
Sep 7 45° 74° 27° (1929) 95° (1998) 0.05" 0"
Sep 8 44° 74° 32° (1962) 98° (1979) 0.05" 0.1"
Sep 9 44° 73° 31° (1992) 92° (1981) 0.05" 0"
Sep 10 44° 73° 29° (1921) 91° (1966) 0.04" 0"
Sep 11 43° 72° 29° (1989) 93° (1919) 0.05" 0.1"
Sep 12 43° 72° 29° (1949) 92° (1919) 0.05" 0"
Sep 13 43° 71° 27° (1921) 89° (1959) 0.05" 0"
Sep 14 43° 71° 27° (1970) 92° (1948) 0.05" 0.1"
Sep 15 42° 70° 29° (1982) 95° (2000) 0.04" 0"
Sep 16 42° 70° 27° (1965) 95° (1892) 0.05" 0"
Sep 17 42° 70° 26° (1965) 92° (2009) 0.05" 0.1"
Sep 18 41° 69° 23° (1965) 93° (1981) 0.04" 0"
Sep 19 41° 69° 26° (1957) 92° (2009) 0.05" 0"
Sep 20 41° 68° 24° (1995) 93° (1917) 0.04" 0.1"
Sep 21 40° 68° 20° (1995) 90° (1917) 0.05" 0"
Sep 22 40° 68° 24° (2000) 91° (1938) 0.04" 0.1"
Sep 23 40° 67° 16° (2000) 93° (1966) 0.05" 0"
Sep 24 39° 67° 10° (1926) 93° (2009) 0.04" 0.1"
Sep 25 39° 66° 17° (1934) 93° (2001) 0.04" 0.1"
Sep 26 39° 66° 20° (1934) 89° (1963) 0.04" 0"
Sep 27 38° 66° 23° (1984) 91° (1963) 0.05" 0.1"
Sep 28 38° 65° 25° (1985) 89° (1967) 0.04" 0"
Sep 29 38° 65° 21° (1985) 91° (1967) 0.04" 0.1"
Sep 30 38° 64° 22° (1985) 91° (1992) 0.04" 0.1"
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