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
Sep 1 46° 74° 34° (1994) 103° (1983) 0.05" NA
Sep 2 46° 73° 30° (1974) 99° (1983) 0.05" NA
Sep 3 46° 73° 29° (1958) 102° (1978) 0.05" NA
Sep 4 45° 72° 28° (1956) 100° (1950) 0.05" NA
Sep 5 45° 72° 28° (1965) 99° (1998) 0.05" NA
Sep 6 44° 71° 32° (1956) 100° (1976) 0.05" NA
Sep 7 44° 71° 30° (1964) 93° (1966) 0.05" NA
Sep 8 43° 70° 31° (2004) 96° (2003) 0.05" NA
Sep 9 43° 70° 28° (1962) 94° (1981) 0.05" NA
Sep 10 42° 69° 25° (1955) 96° (1994) 0.05" NA
Sep 11 42° 69° 24° (1955) 92° (1948) 0.05" NA
Sep 12 41° 68° 25° (1987) 96° (1969) 0.05" NA
Sep 13 41° 68° 22° (1970) 94° (1969) 0.05" NA
Sep 14 41° 68° 22° (1949) 87° (1955) 0.05" NA
Sep 15 40° 67° 23° (2007) 96° (1948) 0.05" NA
Sep 16 40° 67° 24° (1973) 94° (1979) 0.05" NA
Sep 17 39° 66° 27° (1960) 94° (1976) 0.05" NA
Sep 18 39° 66° 28° (1965) 91° (2000) 0.05" NA
Sep 19 39° 66° 17° (1957) 92° (1981) 0.05" NA
Sep 20 38° 65° 24° (1965) 87° (1966) 0.05" NA
Sep 21 38° 65° 18° (1995) 85° (1948) 0.05" NA
Sep 22 38° 65° 19° (1995) 85° (1987) 0.04" NA
Sep 23 37° 64° 24° (1995) 85° (1949) 0.04" NA
Sep 24 37° 64° 25° (1951) 90° (1949) 0.04" NA
Sep 25 37° 63° 22° (1965) 89° (1992) 0.04" NA
Sep 26 36° 63° 19° (1965) 91° (1952) 0.04" NA
Sep 27 36° 63° 18° (1958) 87° (1997) 0.04" NA
Sep 28 36° 63° 25° (1949) 88° (1967) 0.04" NA
Sep 29 35° 62° 20° (1974) 88° (1967) 0.04" NA
Sep 30 35° 62° 15° (1961) 90° (1963) 0.04" NA
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