Heron, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 20° 32° -39° (1927) 61° (1913) 4.27" 28.7"
February 23° 37° -32° (1936) 59° (1995) 3.38" 16.6"
March 27° 46° -22° (1955) 73° (1915) 2.68" 7.7"
April 32° 57° -10° (1936) 88° (1977) 2.22" 1.3"
May 38° 66° 19° (1954) 96° (1936) 2.81" 0.2"
June 44° 73° 25° (1951) 99° (1924) 2.62" 0"
July 47° 81° 29° (1924) 105° (1939) 1.46" 0"
August 46° 80° 21° (1969) 106° (1961) 1.35" 0"
September 40° 70° 9° (1926) 97° (1944) 1.72" 0"
October 33° 55° 4° (1935) 87° (1943) 2.24" 0.4"
November 28° 39° -16° (1955) 69° (1923) 4.55" 9"
December 21° 32° -35° (1968) 66° (1912) 4.46" 22.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 20° 31° -33° (1979) 48° (1997) 0.14" NA
Jan 2 19° 31° -20° (1924) 44° (1939) 0.14" NA
Jan 3 19° 31° -30° (1924) 45° (1963) 0.14" NA
Jan 4 19° 31° -28° (1924) 49° (1930) 0.14" NA
Jan 5 19° 31° -12° (2004) 45° (1956) 0.14" NA
Jan 6 19° 31° -22° (1937) 44° (1956) 0.14" NA
Jan 7 19° 31° -30° (1937) 53° (1945) 0.14" NA
Jan 8 19° 31° -26° (1937) 49° (1945) 0.14" NA
Jan 9 19° 31° -12° (1949) 49° (1945) 0.14" NA
Jan 10 19° 31° -14° (1949) 47° (1953) 0.14" NA
Jan 11 19° 31° -20° (1975) 47° (1932) 0.14" NA
Jan 12 20° 31° -17° (1937) 50° (1953) 0.14" NA
Jan 13 20° 31° -8° (1930) 51° (1945) 0.14" NA
Jan 14 20° 31° -12° (1972) 47° (1943) 0.14" NA
Jan 15 20° 31° -18° (1950) 55° (1943) 0.14" NA
Jan 16 20° 31° -10° (1930) 45° (1961) 0.14" NA
Jan 17 20° 31° -20° (1930) 49° (1920) 0.14" NA
Jan 18 20° 32° -28° (1943) 48° (1919) 0.14" NA
Jan 19 20° 32° -24° (1924) 47° (1920) 0.14" NA
Jan 20 20° 32° -33° (1937) 43° (1993) 0.14" NA
Jan 21 20° 32° -39° (1927) 47° (1934) 0.14" NA
Jan 22 20° 32° -25° (1927) 49° (1936) 0.14" NA
Jan 23 20° 32° -20° (1929) 46° (1934) 0.14" NA
Jan 24 20° 32° -17° (1930) 46° (1947) 0.14" NA
Jan 25 20° 33° -23° (1957) 48° (1935) 0.13" NA
Jan 26 20° 33° -17° (1957) 55° (1913) 0.13" NA
Jan 27 20° 33° -14° (1957) 58° (1913) 0.13" NA
Jan 28 21° 33° -22° (1972) 60° (1913) 0.13" NA
Jan 29 21° 33° -23° (1950) 55° (1913) 0.13" NA
Jan 30 21° 33° -30° (1950) 61° (1913) 0.13" NA
Jan 31 21° 34° -28° (1917) 60° (1913) 0.13" NA
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