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
May 1 34° 60° 15° (1954) 83° (2000) 0.06" NA
May 2 34° 61° 16° (1954) 86° (1985) 0.07" NA
May 3 35° 61° 19° (1967) 86° (1918) 0.07" NA
May 4 35° 61° 23° (1996) 87° (1936) 0.07" NA
May 5 35° 62° 26° (1996) 88° (1911) 0.07" NA
May 6 36° 62° 23° (1919) 88° (1928) 0.07" NA
May 7 36° 62° 24° (1892) 86° (1987) 0.07" NA
May 8 36° 62° 21° (1999) 88° (1987) 0.08" NA
May 9 36° 63° 24° (1990) 85° (1987) 0.08" NA
May 10 37° 63° 21° (2004) 88° (1936) 0.08" NA
May 11 37° 63° 23° (1983) 88° (1960) 0.08" NA
May 12 37° 64° 22° (1943) 90° (2001) 0.08" NA
May 13 37° 64° 20° (2004) 89° (1931) 0.08" NA
May 14 38° 64° 26° (2004) 95° (1936) 0.08" NA
May 15 38° 64° 28° (1929) 93° (1897) 0.08" NA
May 16 38° 65° 30° (1974) 92° (1988) 0.08" NA
May 17 39° 65° 26° (2003) 90° (1893) 0.08" NA
May 18 39° 65° 27° (1977) 90° (2006) 0.08" NA
May 19 39° 66° 30° (1997) 94° (1919) 0.09" NA
May 20 39° 66° 28° (1903) 94° (1897) 0.09" NA
May 21 40° 66° 30° (2001) 93° (1980) 0.09" NA
May 22 40° 66° 29° (1992) 97° (1919) 0.09" NA
May 23 40° 67° 30° (1949) 88° (1988) 0.09" NA
May 24 41° 67° 30° (1995) 90° (1922) 0.09" NA
May 25 41° 67° 31° (1918) 94° (1928) 0.09" NA
May 26 41° 68° 30° (1975) 94° (1936) 0.09" NA
May 27 41° 68° 28° (1918) 95° (1936) 0.09" NA
May 28 42° 68° 27° (1947) 100° (1919) 0.09" NA
May 29 42° 68° 31° (1895) 95° (1936) 0.09" NA
May 30 42° 69° 31° (1917) 93° (1936) 0.09" NA
May 31 42° 69° 28° (1917) 90° (1972) 0.09" NA
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