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
Sep 1 54° 77° 39° (1949) 98° (1953) 0.13" NA
Sep 2 54° 77° 41° (1976) 98° (1953) 0.13" NA
Sep 3 53° 77° 40° (1987) 94° (1953) 0.13" NA
Sep 4 53° 76° 37° (1974) 92° (1960) 0.13" NA
Sep 5 53° 76° 38° (1962) 92° (1954) 0.13" NA
Sep 6 52° 76° 33° (1988) 94° (1954) 0.12" NA
Sep 7 52° 75° 35° (1988) 97° (1985) 0.12" NA
Sep 8 52° 75° 37° (1986) 93° (1960) 0.12" NA
Sep 9 51° 75° 38° (1975) 98° (1955) 0.12" NA
Sep 10 51° 74° 40° (1967) 93° (1978) 0.12" NA
Sep 11 50° 74° 38° (1959) 92° (1978) 0.12" NA
Sep 12 50° 74° 35° (1955) 90° (1978) 0.12" NA
Sep 13 50° 74° 33° (1964) 90° (1998) 0.12" NA
Sep 14 49° 73° 35° (1963) 90° (1998) 0.12" NA
Sep 15 49° 73° 34° (2007) 86° (1971) 0.12" NA
Sep 16 49° 73° 31° (1984) 90° (1955) 0.11" NA
Sep 17 48° 72° 31° (1984) 91° (1955) 0.11" NA
Sep 18 48° 72° 33° (1959) 93° (1955) 0.11" NA
Sep 19 48° 72° 37° (1999) 89° (1948) 0.11" NA
Sep 20 47° 71° 30° (1956) 89° (1978) 0.11" NA
Sep 21 47° 71° 30° (1999) 86° (1959) 0.11" NA
Sep 22 47° 71° 28° (1974) 88° (1959) 0.11" NA
Sep 23 46° 70° 28° (1974) 87° (1959) 0.1" NA
Sep 24 46° 70° 28° (1976) 84° (2004) 0.1" NA
Sep 25 46° 70° 34° (1983) 89° (1984) 0.1" NA
Sep 26 45° 69° 32° (1984) 85° (1986) 0.1" NA
Sep 27 45° 69° 28° (1991) 89° (1998) 0.1" NA
Sep 28 44° 69° 30° (1957) 89° (1952) 0.1" NA
Sep 29 44° 68° 29° (1991) 94° (1953) 0.1" NA
Sep 30 44° 68° 28° (1984) 89° (1971) 0.09" NA
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