Lewistown, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 32° -46° (1929) 73° (1981) 0.89" 11.1"
February 15° 36° -42° (1936) 70° (1932) 0.57" 6.4"
March 21° 43° -28° (1945) 88° (1902) 1.16" 11.6"
April 29° 53° -17° (1936) 89° (1939) 1.38" 8.1"
May 38° 63° 11° (1946) 98° (1931) 2.92" 4.7"
June 45° 72° 21° (1914) 105° (1900) 2.93" 0"
July 50° 79° 27° (1903) 105° (1900) 2.1" 0"
August 49° 80° 27° (1910) 103° (1961) 1.89" 0"
September 40° 69° 6° (1926) 99° (1909) 1.38" 1.3"
October 31° 57° -10° (1935) 92° (1905) 1.06" 4.5"
November 20° 42° -30° (1985) 81° (1908) 0.74" 7.2"
December 13° 34° -42° (1983) 74° (1939) 0.83" 9.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 11° 32° -33° (1942) 55° (1939) 0.03" NA
Jan 2 11° 32° -28° (1928) 54° (2003) 0.03" NA
Jan 3 10° 32° -20° (1910) 56° (1981) 0.03" NA
Jan 4 10° 32° -26° (2004) 55° (1938) 0.03" NA
Jan 5 10° 32° -28° (1909) 55° (1958) 0.03" NA
Jan 6 10° 32° -26° (1913) 55° (2006) 0.03" NA
Jan 7 10° 31° -30° (1937) 68° (2003) 0.03" NA
Jan 8 10° 31° -33° (1909) 61° (1958) 0.03" NA
Jan 9 10° 31° -28° (1909) 60° (1919) 0.03" NA
Jan 10 10° 31° -37° (1909) 57° (1941) 0.03" NA
Jan 11 10° 31° -36° (1916) 60° (1987) 0.03" NA
Jan 12 10° 31° -32° (1916) 62° (1987) 0.03" NA
Jan 13 10° 31° -34° (1972) 60° (1944) 0.03" NA
Jan 14 10° 31° -34° (1972) 61° (2006) 0.03" NA
Jan 15 10° 31° -22° (1896) 60° (1973) 0.03" NA
Jan 16 10° 32° -31° (1916) 64° (1974) 0.03" NA
Jan 17 10° 32° -22° (1940) 56° (1976) 0.03" NA
Jan 18 10° 32° -31° (1963) 57° (1921) 0.03" NA
Jan 19 11° 32° -30° (1949) 60° (1986) 0.03" NA
Jan 20 11° 32° -32° (1949) 58° (1981) 0.03" NA
Jan 21 11° 32° -34° (1927) 61° (1981) 0.03" NA
Jan 22 11° 32° -27° (1963) 73° (1981) 0.03" NA
Jan 23 11° 32° -38° (1929) 64° (2005) 0.03" NA
Jan 24 11° 32° -33° (1949) 65° (2005) 0.03" NA
Jan 25 11° 32° -31° (1969) 65° (2006) 0.03" NA
Jan 26 11° 33° -28° (1902) 60° (1906) 0.03" NA
Jan 27 11° 33° -41° (1916) 60° (1906) 0.03" NA
Jan 28 12° 33° -46° (1929) 66° (1941) 0.02" NA
Jan 29 12° 33° -40° (1929) 64° (1931) 0.02" NA
Jan 30 12° 33° -33° (1996) 65° (1941) 0.02" NA
Jan 31 12° 33° -40° (1917) 61° (1992) 0.02" NA
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