Jefferson, Wisconsin
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 26° -33° (1951) 58° (2002) 1.39" 10"
February 13° 31° -39° (1996) 67° (1999) 1.32" 6.5"
March 24° 43° -21° (1962) 83° (1986) 2.1" 7.8"
April 36° 57° -4° (1979) 90° (2002) 3.42" 1.7"
May 46° 69° 25° (1966) 93° (1978) 3.25" 0.1"
June 56° 79° 35° (2003) 101° (1988) 3.79" 0"
July 61° 83° 39° (1965) 102° (1988) 3.92" 0"
August 58° 80° 37° (1986) 102° (1988) 4.16" 0"
September 49° 73° 28° (1991) 98° (1955) 3.41" 0"
October 38° 61° 11° (1988) 88° (2007) 2.56" 0.1"
November 27° 45° -10° (1950) 78° (1999) 2.49" 2.1"
December 15° 31° -29° (1983) 67° (2001) 1.65" 9.7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 21° 37° -5° (1976) 61° (1962) 0.07" NA
Dec 2 20° 36° -7° (1976) 60° (1962) 0.07" NA
Dec 3 20° 36° -7° (1976) 63° (1970) 0.07" NA
Dec 4 19° 36° 0° (1976) 65° (1998) 0.06" NA
Dec 5 19° 35° 0° (1976) 62° (2001) 0.06" NA
Dec 6 19° 35° -13° (2007) 67° (2001) 0.06" NA
Dec 7 18° 34° -12° (2007) 55° (1951) 0.06" NA
Dec 8 18° 34° -8° (1976) 52° (1966) 0.06" NA
Dec 9 17° 33° -10° (1977) 53° (1991) 0.06" NA
Dec 10 17° 33° -15° (1958) 47° (1959) 0.06" NA
Dec 11 16° 33° -15° (1976) 57° (1949) 0.06" NA
Dec 12 16° 32° -10° (1962) 57° (1949) 0.05" NA
Dec 13 16° 32° -14° (1958) 58° (1991) 0.05" NA
Dec 14 15° 32° -11° (1985) 58° (1975) 0.05" NA
Dec 15 15° 31° -11° (1958) 58° (1975) 0.05" NA
Dec 16 15° 31° -15° (1951) 54° (1984) 0.05" NA
Dec 17 14° 31° -14° (1951) 52° (1984) 0.05" NA
Dec 18 14° 30° -13° (1950) 50° (1957) 0.05" NA
Dec 19 13° 30° -23° (1983) 54° (2002) 0.05" NA
Dec 20 13° 30° -23° (1983) 54° (1967) 0.05" NA
Dec 21 13° 29° -19° (1989) 54° (1967) 0.05" NA
Dec 22 12° 29° -19° (1989) 51° (1957) 0.05" NA
Dec 23 12° 29° -19° (1989) 51° (1965) 0.05" NA
Dec 24 12° 28° -24° (1983) 52° (1979) 0.05" NA
Dec 25 11° 28° -29° (1983) 57° (1982) 0.05" NA
Dec 26 11° 28° -25° (1962) 60° (1982) 0.05" NA
Dec 27 11° 28° -20° (1950) 54° (1982) 0.05" NA
Dec 28 10° 27° -18° (2000) 56° (1982) 0.04" NA
Dec 29 10° 27° -15° (2000) 64° (1984) 0.04" NA
Dec 30 10° 27° -14° (1963) 47° (2002) 0.04" NA
Dec 31 27° -17° (1963) 56° (2002) 0.04" NA
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