Chester, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 28° -57° (1950) 66° (1992) 0.38" NA
February 35° -44° (1994) 74° (1992) 0.26" NA
March 19° 45° -38° (1951) 79° (2004) 0.51" NA
April 29° 58° -19° (1975) 88° (1980) 0.71" NA
May 39° 68° 14° (1954) 94° (2001) 1.77" NA
June 47° 75° 24° (1969) 100° (2002) 2.2" NA
July 50° 83° 31° (1958) 104° (2007) 1.47" NA
August 49° 82° 28° (1992) 105° (1961) 1.21" NA
September 39° 71° 13° (1972) 97° (1963) 0.84" NA
October 28° 59° -17° (1991) 89° (1992) 0.48" NA
November 16° 41° -31° (1959) 75° (1999) 0.36" NA
December 30° -52° (1983) 64° (1987) 0.39" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 45° 77° 32° (1952) 96° (1991) 0.04" NA
Sep 2 44° 77° 23° (1962) 96° (1955) 0.03" NA
Sep 3 44° 76° 23° (1962) 97° (1950) 0.03" NA
Sep 4 43° 76° 28° (1962) 94° (1950) 0.03" NA
Sep 5 43° 75° 21° (1956) 96° (1967) 0.03" NA
Sep 6 43° 75° 27° (1956) 94° (1967) 0.03" NA
Sep 7 42° 74° 25° (1992) 97° (1963) 0.03" NA
Sep 8 42° 74° 24° (1960) 93° (1981) 0.03" NA
Sep 9 41° 74° 21° (1962) 93° (1981) 0.03" NA
Sep 10 41° 73° 25° (1983) 90° (1968) 0.03" NA
Sep 11 40° 73° 20° (1989) 91° (1958) 0.03" NA
Sep 12 40° 72° 20° (1989) 90° (1958) 0.03" NA
Sep 13 40° 72° 21° (1970) 91° (1953) 0.03" NA
Sep 14 39° 71° 22° (1970) 86° (2000) 0.03" NA
Sep 15 39° 71° 19° (1970) 96° (2000) 0.03" NA
Sep 16 39° 71° 22° (1955) 89° (1979) 0.03" NA
Sep 17 38° 70° 22° (1965) 88° (1981) 0.03" NA
Sep 18 38° 70° 21° (1991) 90° (1966) 0.03" NA
Sep 19 38° 70° 21° (1957) 90° (1981) 0.03" NA
Sep 20 37° 69° 25° (1975) 83° (1967) 0.03" NA
Sep 21 37° 69° 15° (1995) 89° (1967) 0.03" NA
Sep 22 36° 69° 20° (1993) 88° (1987) 0.03" NA
Sep 23 36° 68° 17° (2000) 89° (1990) 0.03" NA
Sep 24 36° 68° 18° (1961) 92° (2001) 0.02" NA
Sep 25 36° 68° 15° (1972) 94° (2001) 0.02" NA
Sep 26 35° 67° 20° (1955) 91° (1952) 0.02" NA
Sep 27 35° 67° 15° (1961) 88° (1957) 0.02" NA
Sep 28 35° 67° 15° (1972) 89° (1967) 0.02" NA
Sep 29 34° 67° 13° (1972) 90° (1963) 0.02" NA
Sep 30 34° 66° 13° (1959) 90° (1992) 0.02" NA
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