Westby, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -4° 17° -45° (1969) 55° (2002) 0.39" NA
February 25° -42° (1962) 66° (1992) 0.26" NA
March 15° 37° -31° (2002) 77° (1978) 0.56" NA
April 28° 53° -18° (1975) 91° (1980) 0.9" NA
May 41° 66° 13° (2005) 102° (1980) 1.76" NA
June 51° 74° 28° (1951) 103° (1988) 3" NA
July 55° 79° 36° (1987) 107° (1975) 2.48" NA
August 52° 79° 29° (1958) 108° (1983) 1.55" NA
September 40° 67° 15° (1961) 103° (1983) 1.41" NA
October 29° 55° -5° (1991) 92° (1992) 0.71" NA
November 14° 34° -26° (1996) 73° (1999) 0.4" NA
December 22° -42° (1983) 55° (1979) 0.41" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 26° -18° (1978) 55° (1969) 0.01" NA
Dec 2 26° -21° (1978) 53° (1949) 0.01" NA
Dec 3 26° -20° (1978) 48° (1988) 0.01" NA
Dec 4 25° -27° (1972) 55° (1979) 0.01" NA
Dec 5 25° -26° (1994) 49° (1963) 0.01" NA
Dec 6 25° -30° (1956) 47° (1952) 0.01" NA
Dec 7 25° -28° (1956) 50° (1987) 0.01" NA
Dec 8 24° -29° (1972) 46° (1984) 0.01" NA
Dec 9 24° -35° (1977) 46° (1974) 0.01" NA
Dec 10 24° -25° (1977) 49° (1987) 0.01" NA
Dec 11 23° -21° (1961) 42° (1967) 0.01" NA
Dec 12 23° -22° (1961) 48° (1969) 0.01" NA
Dec 13 23° -20° (1949) 46° (1960) 0.01" NA
Dec 14 22° -27° (1961) 44° (1997) 0.01" NA
Dec 15 22° -28° (1963) 48° (1997) 0.01" NA
Dec 16 22° -31° (1951) 49° (1997) 0.01" NA
Dec 17 22° -28° (1975) 46° (1976) 0.01" NA
Dec 18 21° -32° (1989) 52° (1997) 0.01" NA
Dec 19 21° -34° (1989) 50° (1979) 0.01" NA
Dec 20 -1° 21° -35° (1989) 50° (2004) 0.01" NA
Dec 21 -1° 20° -36° (1989) 46° (1954) 0.01" NA
Dec 22 -1° 20° -35° (1989) 50° (1954) 0.02" NA
Dec 23 -2° 20° -42° (1983) 47° (1953) 0.02" NA
Dec 24 -2° 20° -32° (1983) 42° (1953) 0.02" NA
Dec 25 -2° 19° -32° (1996) 48° (1999) 0.02" NA
Dec 26 -2° 19° -31° (1990) 44° (1972) 0.02" NA
Dec 27 -3° 19° -31° (1990) 53° (1980) 0.02" NA
Dec 28 -3° 18° -26° (1993) 47° (1999) 0.02" NA
Dec 29 -3° 18° -32° (1968) 51° (1999) 0.02" NA
Dec 30 -4° 18° -35° (1968) 47° (1999) 0.02" NA
Dec 31 -4° 18° -32° (1967) 49° (1963) 0.02" NA
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