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
Apr 1 30° 50° 16° (1972) 82° (1986) 0.1" NA
Apr 2 31° 51° 20° (1961) 79° (1963) 0.1" NA
Apr 3 31° 51° 10° (1954) 79° (1956) 0.1" NA
Apr 4 31° 52° 14° (1995) 70° (1956) 0.1" NA
Apr 5 32° 52° 14° (1995) 75° (1997) 0.11" NA
Apr 6 32° 53° -4° (1979) 81° (1988) 0.11" NA
Apr 7 33° 53° 9° (1982) 85° (1991) 0.11" NA
Apr 8 33° 53° 10° (1979) 80° (2001) 0.11" NA
Apr 9 33° 54° 14° (2003) 75° (1991) 0.11" NA
Apr 10 34° 54° 19° (1960) 77° (1955) 0.11" NA
Apr 11 34° 55° 20° (1973) 82° (1977) 0.11" NA
Apr 12 34° 55° 20° (1957) 82° (1977) 0.12" NA
Apr 13 35° 56° 18° (1950) 81° (1977) 0.12" NA
Apr 14 35° 56° 22° (1957) 77° (1954) 0.12" NA
Apr 15 35° 57° 23° (1957) 86° (2003) 0.12" NA
Apr 16 36° 57° 19° (1949) 90° (2002) 0.12" NA
Apr 17 36° 58° 20° (1983) 88° (2002) 0.12" NA
Apr 18 37° 58° 16° (1983) 86° (1977) 0.12" NA
Apr 19 37° 58° 18° (1983) 90° (2002) 0.12" NA
Apr 20 37° 59° 23° (1956) 85° (1985) 0.12" NA
Apr 21 38° 59° 24° (1988) 87° (1987) 0.12" NA
Apr 22 38° 60° 22° (1986) 86° (1985) 0.12" NA
Apr 23 38° 60° 26° (1967) 90° (1980) 0.12" NA
Apr 24 39° 61° 24° (1956) 84° (1960) 0.12" NA
Apr 25 39° 61° 26° (1972) 86° (1990) 0.12" NA
Apr 26 39° 61° 29° (1972) 86° (1990) 0.12" NA
Apr 27 40° 62° 27° (1998) 89° (1986) 0.12" NA
Apr 28 40° 62° 28° (1992) 87° (1986) 0.11" NA
Apr 29 40° 63° 25° (1977) 85° (1970) 0.11" NA
Apr 30 41° 63° 28° (1956) 84° (2007) 0.11" NA
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