Janesville, Wisconsin
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 27° -28° (1994) 59° (1997) 1.35" NA
February 14° 32° -31° (1996) 69° (2000) 1.09" NA
March 25° 45° -11° (2002) 80° (1998) 1.89" NA
April 35° 58° 15° (1995) 89° (2002) 3.47" NA
May 47° 71° 27° (2005) 92° (1991) 3.44" NA
June 56° 81° 36° (1993) 101° (1988) 4.08" NA
July 60° 84° 45° (2001) 101° (1995) 3.18" NA
August 58° 81° 43° (1992) 102° (1988) 4.34" NA
September 49° 74° 28° (1995) 96° (2000) 3.56" NA
October 38° 61° 14° (1988) 88° (2007) 2.25" NA
November 28° 45° -4° (1995) 74° (2000) 2.31" NA
December 15° 31° -25° (2000) 67° (2001) 1.82" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 21° 37° 11° (2002) 59° (1998) 0.07" NA
Dec 2 21° 37° 6° (2006) 57° (1998) 0.07" NA
Dec 3 20° 36° 3° (2006) 60° (1998) 0.07" NA
Dec 4 20° 36° -2° (1991) 63° (1998) 0.07" NA
Dec 5 19° 35° -2° (1991) 64° (1998) 0.07" NA
Dec 6 19° 35° -5° (2007) 67° (2001) 0.07" NA
Dec 7 19° 34° -4° (2007) 52° (1998) 0.07" NA
Dec 8 18° 34° 0° (2006) 51° (1987) 0.06" NA
Dec 9 18° 33° -6° (1995) 55° (1991) 0.06" NA
Dec 10 17° 33° -4° (1995) 49° (1993) 0.06" NA
Dec 11 17° 33° -3° (1995) 49° (1987) 0.06" NA
Dec 12 17° 32° -2° (1989) 47° (1998) 0.06" NA
Dec 13 16° 32° -10° (2000) 56° (1991) 0.06" NA
Dec 14 16° 32° -4° (2000) 45° (1998) 0.06" NA
Dec 15 15° 31° -13° (1989) 53° (2006) 0.06" NA
Dec 16 15° 31° -12° (1989) 48° (1993) 0.06" NA
Dec 17 15° 31° -11° (1989) 50° (2006) 0.06" NA
Dec 18 14° 30° -5° (2000) 50° (2002) 0.06" NA
Dec 19 14° 30° -3° (1989) 52° (1988) 0.06" NA
Dec 20 14° 30° -15° (1989) 47° (1988) 0.06" NA
Dec 21 13° 29° -17° (1989) 44° (2006) 0.05" NA
Dec 22 13° 29° -17° (1989) 46° (2003) 0.05" NA
Dec 23 13° 29° -20° (1989) 45° (2001) 0.05" NA
Dec 24 12° 29° -20° (1989) 42° (2007) 0.05" NA
Dec 25 12° 28° -25° (2000) 42° (2006) 0.05" NA
Dec 26 12° 28° -25° (2000) 45° (1994) 0.05" NA
Dec 27 11° 28° -10° (1990) 48° (1994) 0.05" NA
Dec 28 11° 28° -16° (2000) 52° (2003) 0.05" NA
Dec 29 11° 28° -14° (2000) 51° (2003) 0.05" NA
Dec 30 11° 28° -5° (1998) 48° (2002) 0.05" NA
Dec 31 10° 27° -6° (1987) 56° (2002) 0.05" NA
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