Jefferson City, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 12° 35° -38° (1957) 58° (2005) 0.31" NA
February 15° 39° -39° (1989) 65° (1995) 0.27" NA
March 21° 47° -28° (1955) 72° (1986) 0.47" NA
April 27° 55° -6° (1997) 83° (1987) 0.75" NA
May 35° 64° 9° (1967) 89° (1986) 1.99" NA
June 43° 73° 22° (1954) 96° (1988) 2.16" NA
July 48° 82° 30° (1949) 101° (2002) 1.65" NA
August 46° 82° 19° (1992) 100° (1961) 1.33" NA
September 37° 71° 8° (1965) 94° (1950) 0.99" NA
October 28° 58° -14° (1991) 87° (1992) 0.64" NA
November 19° 42° -34° (1959) 71° (1999) 0.49" NA
December 10° 33° -42° (1990) 62° (1980) 0.33" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jun 1 40° 68° 22° (1954) 87° (1986) 0.09" NA
Jun 2 40° 68° 25° (1954) 88° (1986) 0.08" NA
Jun 3 40° 69° 25° (1951) 84° (1970) 0.09" NA
Jun 4 40° 69° 27° (1998) 90° (1988) 0.09" NA
Jun 5 41° 69° 26° (1998) 90° (1988) 0.08" NA
Jun 6 41° 70° 28° (1962) 88° (1977) 0.09" NA
Jun 7 41° 70° 26° (1962) 89° (2000) 0.08" NA
Jun 8 41° 70° 29° (1950) 89° (1996) 0.08" NA
Jun 9 41° 70° 28° (1994) 91° (1996) 0.09" NA
Jun 10 42° 71° 28° (1999) 88° (1956) 0.08" NA
Jun 11 42° 71° 27° (1978) 88° (1992) 0.07" NA
Jun 12 42° 71° 30° (1969) 90° (1979) 0.08" NA
Jun 13 42° 72° 28° (1966) 89° (1979) 0.08" NA
Jun 14 42° 72° 28° (1969) 90° (1987) 0.07" NA
Jun 15 43° 72° 28° (1994) 90° (1987) 0.07" NA
Jun 16 43° 73° 29° (2004) 89° (1988) 0.08" NA
Jun 17 43° 73° 28° (1954) 92° (1974) 0.07" NA
Jun 18 43° 73° 26° (1973) 92° (1974) 0.07" NA
Jun 19 43° 74° 24° (1973) 93° (1974) 0.07" NA
Jun 20 44° 74° 30° (1983) 93° (1988) 0.07" NA
Jun 21 44° 74° 33° (1953) 89° (1961) 0.06" NA
Jun 22 44° 75° 32° (1963) 92° (1954) 0.07" NA
Jun 23 44° 75° 28° (2003) 94° (1988) 0.06" NA
Jun 24 45° 75° 32° (1960) 94° (1974) 0.06" NA
Jun 25 45° 76° 33° (1953) 96° (1988) 0.06" NA
Jun 26 45° 76° 32° (1953) 96° (1988) 0.05" NA
Jun 27 45° 77° 32° (1949) 91° (1990) 0.06" NA
Jun 28 45° 77° 32° (1975) 94° (2007) 0.05" NA
Jun 29 46° 77° 30° (1971) 94° (2007) 0.06" NA
Jun 30 46° 78° 29° (1949) 95° (1990) 0.05" NA
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