Great Falls/Malmstrom AFB, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 32° -44° (1909) 67° (1992) 0.68" 9.6"
February 15° 38° -49° (1936) 84° (1892) 0.51" 7.6"
March 21° 45° -32° (1932) 80° (1892) 1.01" 11.5"
April 30° 56° -10° (1936) 89° (1980) 1.4" 8"
May 38° 65° 15° (1954) 100° (1919) 2.53" 2.3"
June 46° 74° 31° (1999) 102° (1919) 2.24" 0"
July 50° 82° 35° (1915) 107° (1933) 1.45" 0"
August 50° 81° 30° (1992) 106° (1969) 1.65" 0.3"
September 41° 70° 10° (1926) 100° (1893) 1.23" 1.4"
October 33° 58° -11° (1991) 91° (1992) 0.93" 4.4"
November 23° 42° -25° (1985) 83° (1892) 0.59" 7.4"
December 14° 34° -43° (1968) 69° (1939) 0.67" 8.4"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 46° 76° 34° (1930) 97° (1967) 0.05" NA
Sep 2 46° 75° 33° (1962) 96° (1969) 0.05" NA
Sep 3 45° 75° 34° (1956) 95° (1978) 0.05" NA
Sep 4 45° 74° 33° (1929) 100° (1893) 0.05" NA
Sep 5 44° 74° 31° (1956) 98° (1967) 0.05" NA
Sep 6 44° 73° 27° (1929) 98° (1980) 0.05" NA
Sep 7 44° 73° 27° (1929) 95° (1998) 0.04" NA
Sep 8 43° 72° 32° (1962) 98° (1979) 0.04" NA
Sep 9 43° 72° 31° (1992) 92° (1981) 0.04" NA
Sep 10 43° 72° 29° (1921) 91° (1966) 0.04" NA
Sep 11 42° 71° 29° (1989) 93° (1919) 0.04" NA
Sep 12 42° 71° 29° (1949) 92° (1919) 0.04" NA
Sep 13 42° 70° 27° (1921) 89° (1959) 0.04" NA
Sep 14 41° 70° 27° (1970) 92° (1948) 0.04" NA
Sep 15 41° 70° 29° (1982) 95° (2000) 0.04" NA
Sep 16 41° 69° 27° (1965) 95° (1892) 0.04" NA
Sep 17 41° 69° 26° (1965) 90° (1981) 0.04" NA
Sep 18 40° 68° 23° (1965) 93° (1981) 0.04" NA
Sep 19 40° 68° 26° (1957) 91° (1938) 0.04" NA
Sep 20 40° 68° 24° (1995) 93° (1917) 0.04" NA
Sep 21 39° 67° 20° (1995) 90° (1917) 0.04" NA
Sep 22 39° 67° 24° (2000) 91° (1938) 0.04" NA
Sep 23 39° 67° 16° (2000) 93° (1966) 0.04" NA
Sep 24 39° 66° 10° (1926) 91° (2001) 0.04" NA
Sep 25 38° 66° 17° (1934) 93° (2001) 0.04" NA
Sep 26 38° 66° 20° (1934) 89° (1963) 0.04" NA
Sep 27 38° 65° 23° (1984) 91° (1963) 0.04" NA
Sep 28 38° 65° 25° (1985) 89° (1967) 0.03" NA
Sep 29 38° 65° 21° (1985) 91° (1967) 0.03" NA
Sep 30 37° 64° 22° (1985) 91° (1992) 0.03" NA
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