Grafton, Wisconsin
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 13° 30° -26° (1963) 57° (1973) 1.5" 11.6"
February 16° 33° -29° (1996) 61° (1984) 1.46" 9.1"
March 25° 41° -15° (1962) 82° (2007) 1.96" 6.4"
April 35° 52° 11° (1982) 92° (1980) 3.28" 0.6"
May 45° 62° 23° (1966) 90° (2007) 3.43" 0.1"
June 55° 72° 29° (2003) 102° (1988) 3.82" 0"
July 61° 78° 40° (1965) 106° (1995) 4.01" 0"
August 61° 78° 42° (1986) 103° (1988) 3.95" 0"
September 52° 71° 28° (1995) 96° (1976) 3.47" 0"
October 41° 59° 16° (1988) 89° (1963) 2.44" 0.1"
November 30° 46° -10° (1976) 76° (1978) 2.36" 1"
December 18° 34° -20° (1983) 68° (2001) 1.98" 9.2"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 40° 57° 28° (1963) 86° (1992) 0.11" 0"
May 2 40° 57° 30° (1961) 85° (1965) 0.11" 0"
May 3 41° 58° 28° (2004) 78° (1965) 0.11" 0"
May 4 41° 58° 32° (2002) 86° (1980) 0.11" 0"
May 5 41° 58° 25° (1983) 85° (1980) 0.11" 0"
May 6 42° 58° 29° (1976) 78° (1986) 0.11" 0"
May 7 42° 59° 25° (1972) 81° (1963) 0.1" 0"
May 8 42° 59° 32° (1966) 86° (1963) 0.11" 0"
May 9 43° 59° 25° (1966) 85° (1987) 0.11" 0"
May 10 43° 60° 23° (1966) 84° (1985) 0.1" 0"
May 11 43° 60° 35° (1966) 84° (1987) 0.11" 0.1"
May 12 43° 60° 31° (1967) 83° (1965) 0.1" 0"
May 13 44° 61° 31° (1966) 89° (1977) 0.11" 0"
May 14 44° 61° 35° (1988) 85° (1962) 0.1" 0"
May 15 44° 61° 35° (1967) 90° (2007) 0.1" 0"
May 16 45° 61° 32° (1983) 82° (1998) 0.11" 0"
May 17 45° 62° 29° (1983) 82° (1987) 0.11" 0"
May 18 45° 62° 29° (2002) 90° (1996) 0.11" 0"
May 19 45° 62° 34° (2000) 87° (1996) 0.11" 0"
May 20 46° 63° 35° (2002) 89° (1972) 0.11" 0"
May 21 46° 63° 32° (2002) 89° (1970) 0.11" 0"
May 22 46° 63° 33° (1967) 88° (1964) 0.11" 0"
May 23 47° 64° 34° (1963) 86° (1964) 0.12" 0"
May 24 47° 64° 34° (1963) 84° (1991) 0.11" 0"
May 25 47° 64° 35° (1988) 83° (2007) 0.12" 0"
May 26 48° 65° 36° (1961) 85° (1966) 0.12" 0"
May 27 48° 65° 30° (1961) 84° (1969) 0.12" 0"
May 28 48° 65° 37° (1983) 90° (1969) 0.11" 0"
May 29 49° 66° 33° (1964) 87° (1962) 0.12" 0"
May 30 49° 66° 36° (1966) 88° (1987) 0.12" 0"
May 31 49° 66° 35° (1996) 88° (1986) 0.12" 0"
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