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
Mar 1 25° 41° -10° (1922) 58° (1968) 0.1" NA
Mar 2 25° 41° -8° (1960) 56° (1926) 0.1" NA
Mar 3 25° 42° -20° (1960) 56° (1968) 0.1" NA
Mar 4 25° 42° -22° (1955) 61° (1968) 0.1" NA
Mar 5 25° 42° -17° (1955) 58° (2005) 0.1" NA
Mar 6 25° 43° -12° (1943) 60° (1992) 0.1" NA
Mar 7 25° 43° -8° (1943) 62° (2005) 0.1" NA
Mar 8 25° 43° 0° (2002) 62° (1953) 0.09" NA
Mar 9 26° 44° 1° (1923) 65° (1953) 0.09" NA
Mar 10 26° 44° 0° (1932) 63° (1934) 0.09" NA
Mar 11 26° 44° -7° (1956) 64° (1934) 0.09" NA
Mar 12 26° 45° -8° (1950) 66° (1934) 0.09" NA
Mar 13 26° 45° 2° (1932) 67° (1992) 0.09" NA
Mar 14 26° 45° 0° (1944) 67° (1992) 0.09" NA
Mar 15 27° 46° 3° (1955) 66° (1981) 0.09" NA
Mar 16 27° 46° 3° (1943) 66° (1947) 0.08" NA
Mar 17 27° 46° -6° (1943) 65° (1941) 0.08" NA
Mar 18 27° 47° -7° (1943) 64° (1934) 0.08" NA
Mar 19 27° 47° 2° (1965) 65° (1934) 0.08" NA
Mar 20 27° 47° -6° (1943) 68° (1928) 0.08" NA
Mar 21 27° 48° -1° (1913) 69° (1915) 0.08" NA
Mar 22 28° 48° 8° (1935) 73° (1915) 0.08" NA
Mar 23 28° 48° 7° (1965) 68° (1940) 0.08" NA
Mar 24 28° 49° -9° (1965) 67° (1918) 0.08" NA
Mar 25 28° 49° -3° (1913) 64° (1992) 0.08" NA
Mar 26 28° 50° 2° (1965) 64° (1912) 0.08" NA
Mar 27 28° 50° -4° (1944) 69° (1986) 0.08" NA
Mar 28 28° 50° 2° (1975) 68° (1941) 0.08" NA
Mar 29 29° 51° 7° (1936) 67° (1919) 0.08" NA
Mar 30 29° 51° 2° (1924) 72° (2004) 0.07" NA
Mar 31 29° 52° 8° (1935) 69° (1992) 0.07" NA
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