Lewistown, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -12° -43.3° (1929) 22.8° (1981) 0.89" 11.1"
February -9° -41.1° (1936) 21.1° (1932) 0.57" 6.4"
March -6° -33.3° (1945) 31.1° (1902) 1.16" 11.6"
April -2° 12° -27.2° (1936) 31.7° (1939) 1.38" 8.1"
May 17° -11.7° (1946) 36.7° (1931) 2.92" 4.7"
June 22° -6.1° (1914) 40.6° (1900) 2.93" 0"
July 10° 26° -2.8° (1903) 40.6° (1900) 2.1" 0"
August 27° -2.8° (1910) 39.4° (1961) 1.89" 0"
September 21° -14.4° (1926) 37.2° (1909) 1.38" 1.3"
October -1° 14° -23.3° (1935) 33.3° (1905) 1.06" 4.5"
November -7° -34.4° (1985) 27.2° (1908) 0.74" 7.2"
December -11° -41.1° (1983) 23.3° (1939) 0.83" 9.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Feb 1 -11.1° 1.1° -34° (1989) 18° (1941) 0.02" NA
Feb 2 -11.1° 1.1° -37° (1989) 19° (1906) 0.02" NA
Feb 3 -11.1° 1.1° -36° (1989) 17° (1935) 0.02" NA
Feb 4 -10.6° 1.1° -38° (1989) 17° (1941) 0.02" NA
Feb 5 -10.6° 1.1° -32° (1913) 16° (1941) 0.02" NA
Feb 6 -10.6° 1.7° -34° (1914) 19° (1987) 0.02" NA
Feb 7 -10.6° 1.7° -37° (1936) 17° (1991) 0.02" NA
Feb 8 -10.6° 1.7° -39° (1936) 18° (1987) 0.02" NA
Feb 9 -10° 1.7° -37° (1939) 14° (1926) 0.02" NA
Feb 10 -10° 1.7° -33° (1939) 17° (1926) 0.02" NA
Feb 11 -10° 2.2° -36° (1905) 17° (2005) 0.02" NA
Feb 12 -10° 2.2° -34° (1905) 16° (1921) 0.02" NA
Feb 13 -10° 2.2° -37° (1936) 16° (1931) 0.02" NA
Feb 14 -9.4° 2.2° -37° (1936) 18° (1921) 0.02" NA
Feb 15 -9.4° 2.2° -39° (1936) 15° (1991) 0.02" NA
Feb 16 -9.4° 2.8° -37° (1936) 16° (1907) 0.02" NA
Feb 17 -9.4° 2.8° -41° (1936) 18° (1943) 0.02" NA
Feb 18 -9.4° 2.8° -36° (1936) 14° (1943) 0.02" NA
Feb 19 -8.9° 2.8° -33° (1918) 18° (1981) 0.02" NA
Feb 20 -8.9° 2.8° -38° (1918) 17° (1916) 0.02" NA
Feb 21 -8.9° 3.3° -28° (1918) 17° (1982) 0.02" NA
Feb 22 -8.9° 3.3° -38° (1910) 15° (1905) 0.02" NA
Feb 23 -8.9° 3.3° -32° (1928) 16° (1908) 0.02" NA
Feb 24 -8.3° 3.3° -32° (1922) 19° (1995) 0.02" NA
Feb 25 -8.3° 3.3° -28° (1945) 18° (1983) 0.02" NA
Feb 26 -8.3° 3.3° -28° (1947) 18° (1921) 0.02" NA
Feb 27 -8.3° 3.9° -31° (1960) 21° (1932) 0.02" NA
Feb 28 -7.8° 3.9° -27° (1947) 19° (1986) 0.03" NA
Feb 29 -7.8° 3.9° -25° (1996) 19° (1992) 0.03" NA
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