Helena, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 10° 30° -42° (1957) 63° (1902) 0.52" 8.2"
February 16° 37° -42° (1996) 69° (1995) 0.38" 5.7"
March 24° 47° -30° (1955) 78° (2004) 0.63" 6.8"
April 31° 57° -10° (1936) 86° (1992) 0.91" 4.6"
May 40° 66° 17° (1954) 95° (1919) 1.78" 0.9"
June 48° 75° 30° (1999) 102° (1900) 1.82" 0"
July 52° 83° 36° (1971) 105° (2002) 1.34" 0"
August 51° 83° 28° (1992) 105° (1969) 1.29" 0.3"
September 41° 71° 6° (1926) 99° (1967) 1.05" 1.2"
October 31° 58° -8° (1991) 87° (2001) 0.66" 2.8"
November 20° 42° -39° (1959) 75° (1999) 0.48" 5.4"
December 11° 31° -40° (1880) 64° (1980) 0.46" 7.4"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 46° 77° 33° (1930) 96° (1967) 0.04" NA
Sep 2 46° 77° 32° (1959) 97° (2007) 0.04" NA
Sep 3 46° 76° 32° (1958) 96° (2001) 0.04" NA
Sep 4 45° 76° 31° (1962) 96° (1998) 0.04" NA
Sep 5 45° 75° 30° (1956) 99° (1967) 0.04" NA
Sep 6 44° 75° 30° (1956) 92° (1988) 0.04" NA
Sep 7 44° 74° 28° (1992) 96° (1998) 0.04" NA
Sep 8 44° 74° 29° (1960) 93° (1994) 0.04" NA
Sep 9 43° 74° 25° (1959) 93° (1982) 0.04" NA
Sep 10 43° 73° 30° (1921) 91° (1966) 0.04" NA
Sep 11 43° 73° 27° (1890) 92° (1958) 0.04" NA
Sep 12 42° 72° 22° (1949) 91° (1990) 0.04" NA
Sep 13 42° 72° 27° (1974) 92° (1959) 0.04" NA
Sep 14 42° 71° 18° (1970) 94° (1948) 0.04" NA
Sep 15 41° 71° 22° (1970) 94° (2000) 0.04" NA
Sep 16 41° 71° 27° (1965) 90° (1979) 0.03" NA
Sep 17 41° 70° 20° (1965) 90° (1998) 0.03" NA
Sep 18 40° 70° 19° (1965) 91° (1966) 0.03" NA
Sep 19 40° 69° 25° (1965) 88° (1956) 0.03" NA
Sep 20 40° 69° 20° (1983) 90° (1922) 0.03" NA
Sep 21 39° 69° 20° (1995) 90° (1967) 0.03" NA
Sep 22 39° 68° 21° (1934) 89° (1966) 0.03" NA
Sep 23 39° 68° 16° (1926) 90° (1966) 0.03" NA
Sep 24 38° 68° 6° (1926) 87° (2001) 0.03" NA
Sep 25 38° 67° 17° (1926) 95° (2001) 0.03" NA
Sep 26 38° 67° 20° (1900) 88° (1952) 0.03" NA
Sep 27 37° 67° 23° (1961) 88° (1963) 0.03" NA
Sep 28 37° 66° 19° (1965) 89° (1892) 0.03" NA
Sep 29 37° 66° 19° (1985) 84° (1967) 0.03" NA
Sep 30 36° 65° 21° (1950) 89° (1963) 0.03" NA
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