Heron, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 22° 33° -39° (1927) 61° (1913) 4.25" 24.5"
February 23° 38° -32° (1936) 59° (1995) 3.01" 11.9"
March 27° 47° -22° (1955) 73° (1915) 2.94" 8.6"
April 32° 57° -10° (1936) 88° (1977) 2.36" 1.3"
May 38° 66° 19° (1954) 96° (1936) 2.83" 0.1"
June 45° 73° 25° (1951) 99° (1924) 2.82" 0"
July 47° 81° 29° (1924) 105° (1939) 1.38" 0"
August 46° 81° 21° (1969) 106° (1961) 1.07" 0"
September 40° 70° 9° (1926) 97° (1944) 1.73" 0"
October 33° 55° 4° (1935) 87° (1943) 2.69" 0.3"
November 29° 40° -16° (1955) 69° (1923) 4.61" 8.5"
December 22° 32° -35° (1968) 66° (1912) 4.15" 24.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jun 1 43° 70° 25° (1951) 93° (1986) 0.11" 0"
Jun 2 43° 70° 27° (1951) 90° (1986) 0.11" 0"
Jun 3 43° 70° 28° (1918) 93° (1970) 0.11" 0"
Jun 4 43° 70° 27° (1937) 89° (1969) 0.11" 0"
Jun 5 43° 71° 29° (1925) 89° (1949) 0.11" 0"
Jun 6 43° 71° 33° (1939) 91° (1949) 0.11" 0"
Jun 7 44° 71° 26° (1919) 92° (1926) 0.12" 0"
Jun 8 44° 71° 28° (1919) 88° (1918) 0.11" 0"
Jun 9 44° 71° 25° (1926) 94° (1918) 0.1" 0"
Jun 10 44° 72° 26° (1926) 88° (1918) 0.11" 0"
Jun 11 44° 72° 27° (1926) 91° (1918) 0.1" 0"
Jun 12 44° 72° 26° (1926) 93° (1940) 0.11" 0"
Jun 13 44° 72° 27° (1926) 93° (1918) 0.09" 0"
Jun 14 45° 72° 29° (1979) 95° (1987) 0.1" 0"
Jun 15 45° 73° 31° (1979) 95° (1974) 0.1" 0"
Jun 16 45° 73° 30° (1926) 92° (1917) 0.09" 0"
Jun 17 45° 73° 32° (1942) 94° (1916) 0.09" 0"
Jun 18 45° 73° 30° (1949) 91° (1940) 0.09" 0"
Jun 19 45° 74° 31° (1921) 98° (1919) 0.09" 0"
Jun 20 45° 74° 29° (1943) 98° (1919) 0.09" 0"
Jun 21 45° 74° 29° (1942) 95° (1925) 0.08" 0"
Jun 22 45° 75° 30° (1942) 97° (1973) 0.09" 0"
Jun 23 45° 75° 32° (1924) 95° (1992) 0.08" 0"
Jun 24 45° 75° 29° (1985) 97° (1912) 0.08" 0"
Jun 25 46° 75° 30° (1985) 95° (1912) 0.08" 0"
Jun 26 46° 76° 31° (1939) 96° (1925) 0.08" 0"
Jun 27 46° 76° 30° (1920) 97° (1925) 0.07" 0"
Jun 28 46° 76° 29° (1940) 93° (1979) 0.07" 0"
Jun 29 46° 77° 33° (1964) 94° (1925) 0.07" 0"
Jun 30 46° 77° 31° (1919) 99° (1924) 0.07" 0"
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