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
Dec 1 15° 35° -25° (1985) 57° (1903) 0.02" NA
Dec 2 15° 34° -25° (1985) 58° (1941) 0.01" NA
Dec 3 14° 34° -26° (1880) 62° (1975) 0.01" NA
Dec 4 14° 34° -24° (1972) 64° (1918) 0.01" NA
Dec 5 14° 34° -28° (1972) 60° (1939) 0.01" NA
Dec 6 13° 33° -30° (1972) 60° (1987) 0.01" NA
Dec 7 13° 33° -28° (1972) 54° (1887) 0.01" NA
Dec 8 13° 33° -35° (1972) 60° (1939) 0.01" NA
Dec 9 12° 33° -30° (1972) 59° (1957) 0.01" NA
Dec 10 12° 32° -27° (1972) 63° (1939) 0.01" NA
Dec 11 12° 32° -22° (1961) 59° (2004) 0.01" NA
Dec 12 12° 32° -23° (1922) 62° (1921) 0.01" NA
Dec 13 12° 32° -22° (1919) 58° (1924) 0.01" NA
Dec 14 11° 31° -20° (1926) 63° (1924) 0.01" NA
Dec 15 11° 31° -25° (1924) 57° (1980) 0.01" NA
Dec 16 11° 31° -36° (1964) 60° (1942) 0.01" NA
Dec 17 11° 31° -38° (1964) 58° (1998) 0.01" NA
Dec 18 11° 31° -30° (1924) 59° (1917) 0.02" NA
Dec 19 10° 31° -30° (1924) 59° (2004) 0.02" NA
Dec 20 10° 30° -25° (1990) 55° (1900) 0.02" NA
Dec 21 10° 30° -32° (1990) 60° (1933) 0.02" NA
Dec 22 10° 30° -35° (1990) 58° (1933) 0.02" NA
Dec 23 10° 30° -32° (1983) 54° (1936) 0.02" NA
Dec 24 10° 30° -37° (1983) 57° (1919) 0.02" NA
Dec 25 10° 30° -26° (1983) 54° (1890) 0.02" NA
Dec 26 30° -27° (1996) 61° (1980) 0.02" NA
Dec 27 30° -20° (1916) 64° (1980) 0.02" NA
Dec 28 30° -25° (1983) 55° (1897) 0.02" NA
Dec 29 30° -38° (1880) 55° (1933) 0.02" NA
Dec 30 30° -40° (1880) 54° (1917) 0.02" NA
Dec 31 29° -34° (1968) 56° (1917) 0.02" NA
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