Lewistown, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 13° 34° -46° (1929) 73° (1981) 0.57" 9.8"
February 15° 37° -42° (1936) 70° (1932) 0.46" 5.3"
March 22° 44° -28° (1945) 88° (1902) 0.99" 12"
April 29° 54° -17° (1936) 89° (1939) 1.41" 8.1"
May 38° 63° 11° (1946) 98° (1931) 2.85" 4.8"
June 45° 71° 21° (1914) 105° (1900) 3.08" 0.1"
July 50° 81° 27° (1903) 105° (1900) 1.93" 0"
August 50° 81° 27° (1910) 103° (1961) 1.73" 0"
September 41° 69° 6° (1926) 99° (1909) 1.35" 1.6"
October 31° 57° -10° (1935) 92° (1905) 1.13" 3.9"
November 21° 43° -30° (1985) 81° (1908) 0.71" 7.5"
December 13° 34° -42° (1983) 74° (1939) 0.66" 9.7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 26° 49° -12° (1908) 71° (1991) 0.04" 0.4"
Apr 2 26° 49° -17° (1936) 74° (1921) 0.04" 0.4"
Apr 3 27° 50° -4° (1936) 73° (1992) 0.04" 0.4"
Apr 4 27° 50° 8° (1935) 71° (1944) 0.04" 0.4"
Apr 5 27° 50° -8° (1936) 74° (1969) 0.05" 0.3"
Apr 6 27° 51° 1° (1975) 80° (1930) 0.04" 0.4"
Apr 7 28° 51° 6° (1926) 82° (1930) 0.04" 0.4"
Apr 8 28° 51° -5° (1982) 74° (1910) 0.04" 0.4"
Apr 9 28° 52° 3° (1921) 81° (1910) 0.05" 0.3"
Apr 10 28° 52° -1° (1995) 77° (1898) 0.04" 0.3"
Apr 11 28° 52° -11° (1940) 80° (1925) 0.04" 0.3"
Apr 12 28° 53° 0° (1997) 78° (1976) 0.04" 0.3"
Apr 13 29° 53° 2° (1928) 82° (1908) 0.04" 0.3"
Apr 14 29° 53° 0° (1986) 82° (1915) 0.05" 0.3"
Apr 15 29° 54° -11° (1896) 81° (1913) 0.04" 0.2"
Apr 16 29° 54° -9° (1896) 80° (1926) 0.05" 0.3"
Apr 17 29° 54° 4° (1896) 81° (1923) 0.04" 0.2"
Apr 18 30° 54° 5° (1951) 81° (1936) 0.04" 0.3"
Apr 19 30° 55° 3° (1941) 86° (1910) 0.05" 0.2"
Apr 20 30° 55° 0° (1927) 84° (1908) 0.05" 0.2"
Apr 21 30° 55° 0° (2008) 82° (1906) 0.05" 0.2"
Apr 22 31° 56° 1° (1967) 86° (1906) 0.05" 0.2"
Apr 23 31° 56° 13° (1931) 80° (1906) 0.05" 0.2"
Apr 24 31° 56° 17° (1958) 84° (1910) 0.05" 0.1"
Apr 25 31° 57° 9° (1960) 83° (1952) 0.06" 0.2"
Apr 26 32° 57° 17° (1929) 86° (1910) 0.05" 0.1"
Apr 27 32° 57° 15° (1994) 82° (1928) 0.06" 0.2"
Apr 28 32° 58° 9° (1907) 86° (1939) 0.06" 0.2"
Apr 29 32° 58° 12° (1903) 89° (1939) 0.06" 0.2"
Apr 30 33° 58° 5° (1909) 83° (1926) 0.06" 0.2"
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