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
May 1 41° 64° 26° (1961) 88° (1952) 0.11" NA
May 2 41° 64° 27° (1966) 87° (1959) 0.11" NA
May 3 42° 64° 26° (2004) 86° (1949) 0.11" NA
May 4 42° 65° 28° (1954) 90° (1952) 0.11" NA
May 5 42° 65° 31° (1968) 89° (1959) 0.11" NA
May 6 43° 66° 28° (1970) 87° (1959) 0.11" NA
May 7 43° 66° 27° (1989) 85° (1965) 0.11" NA
May 8 43° 66° 30° (1989) 85° (1963) 0.1" NA
May 9 44° 67° 25° (1966) 87° (1979) 0.1" NA
May 10 44° 67° 25° (1966) 88° (1979) 0.1" NA
May 11 44° 68° 27° (1981) 88° (1979) 0.1" NA
May 12 45° 68° 30° (1960) 84° (1992) 0.1" NA
May 13 45° 68° 32° (1953) 86° (1961) 0.1" NA
May 14 46° 69° 32° (1964) 87° (1991) 0.1" NA
May 15 46° 69° 33° (1984) 89° (2007) 0.1" NA
May 16 46° 70° 31° (1957) 88° (1962) 0.1" NA
May 17 47° 70° 34° (1973) 90° (1977) 0.1" NA
May 18 47° 70° 30° (2002) 90° (1962) 0.1" NA
May 19 47° 71° 28° (1981) 90° (1977) 0.1" NA
May 20 48° 71° 34° (1954) 92° (1977) 0.1" NA
May 21 48° 71° 27° (1997) 91° (1977) 0.1" NA
May 22 48° 72° 32° (1961) 89° (1956) 0.1" NA
May 23 49° 72° 29° (1958) 87° (1972) 0.1" NA
May 24 49° 73° 35° (1956) 89° (1950) 0.11" NA
May 25 49° 73° 31° (1988) 90° (1977) 0.11" NA
May 26 50° 73° 33° (1961) 90° (1967) 0.11" NA
May 27 50° 74° 31° (1992) 91° (1978) 0.11" NA
May 28 50° 74° 33° (1949) 93° (1978) 0.11" NA
May 29 51° 74° 32° (1984) 92° (2006) 0.11" NA
May 30 51° 75° 34° (1996) 92° (1991) 0.11" NA
May 31 51° 75° 35° (1966) 90° (1988) 0.11" NA
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