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
Nov 1 -3.9° 9.4° -21° (1935) 25° (1947) 0.03" NA
Nov 2 -3.9° 8.9° -23° (1935) 24° (1903) 0.03" NA
Nov 3 -3.9° 8.9° -21° (1936) 27° (1908) 0.03" NA
Nov 4 -4.4° 8.3° -23° (2003) 24° (1908) 0.03" NA
Nov 5 -4.4° 8.3° -20° (1959) 26° (1975) 0.03" NA
Nov 6 -5° 7.8° -19° (1971) 22° (1997) 0.03" NA
Nov 7 -5° 7.8° -23° (1936) 25° (1999) 0.03" NA
Nov 8 -5° 7.2° -23° (1966) 23° (1930) 0.03" NA
Nov 9 -5.6° 6.7° -27° (1911) 27° (1905) 0.03" NA
Nov 10 -5.6° 6.7° -31° (1911) 24° (1905) 0.03" NA
Nov 11 -6.1° 6.7° -29° (1911) 23° (1905) 0.03" NA
Nov 12 -6.1° 6.1° -31° (1986) 24° (1934) 0.03" NA
Nov 13 -6.1° 6.1° -32° (1959) 27° (1905) 0.03" NA
Nov 14 -6.7° 5.6° -22° (1909) 22° (1999) 0.03" NA
Nov 15 -6.7° 5.6° -33° (1959) 23° (1934) 0.02" NA
Nov 16 -6.7° -34° (1959) 19° (1943) 0.02" NA
Nov 17 -7.2° -30° (1903) 19° (1924) 0.02" NA
Nov 18 -7.2° 4.4° -28° (1903) 22° (1908) 0.02" NA
Nov 19 -7.2° 4.4° -31° (1921) 22° (1936) 0.02" NA
Nov 20 -7.8° 4.4° -32° (1900) 18° (1908) 0.02" NA
Nov 21 -7.8° 3.9° -29° (1929) 22° (1939) 0.02" NA
Nov 22 -7.8° 3.9° -33° (1985) 22° (1939) 0.02" NA
Nov 23 -7.8° 3.9° -34° (1985) 18° (1944) 0.02" NA
Nov 24 -8.3° 3.3° -28° (1993) 19° (1914) 0.02" NA
Nov 25 -8.3° 3.3° -32° (1985) 18° (1939) 0.02" NA
Nov 26 -8.3° 3.3° -31° (1985) 19° (1914) 0.02" NA
Nov 27 -8.9° 3.3° -32° (1985) 19° (1904) 0.02" NA
Nov 28 -8.9° 2.8° -31° (1897) 19° (1901) 0.02" NA
Nov 29 -8.9° 2.8° -24° (1905) 18° (1924) 0.02" NA
Nov 30 -8.9° 2.8° -29° (1985) 19° (1969) 0.02" NA
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