Tonica, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 14° 30° -26° (1985) 66° (2008) 1.52" 8.1"
February 18° 36° -21° (1979) 72° (1976) 1.66" 5.2"
March 28° 48° -8° (2002) 82° (1998) 2.68" 3.3"
April 39° 62° 13° (1982) 91° (1987) 3.38" 0.4"
May 49° 73° 25° (1989) 94° (2006) 4.46" 0"
June 59° 82° 37° (1969) 101° (1988) 3.82" 0"
July 63° 85° 42° (1972) 104° (1983) 4.47" 0"
August 61° 83° 40° (1986) 103° (1988) 4.17" 0"
September 52° 77° 27° (1974) 98° (2000) 3.33" 0"
October 41° 64° 16° (1988) 91° (2007) 3.09" 0.1"
November 31° 49° -5° (1977) 79° (2000) 3.07" 0.6"
December 18° 34° -21° (1989) 70° (1970) 2.36" 8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Oct 1 45° 71° 32° (1974) 90° (1971) 0.1" 0"
Oct 2 45° 70° 24° (1974) 89° (1976) 0.1" 0"
Oct 3 45° 70° 26° (2003) 88° (1976) 0.1" 0"
Oct 4 44° 69° 27° (1989) 89° (2006) 0.1" 0"
Oct 5 44° 69° 28° (1980) 90° (2005) 0.1" 0"
Oct 6 44° 69° 29° (1988) 91° (1963) 0.1" 0"
Oct 7 43° 68° 28° (2000) 89° (2007) 0.09" 0"
Oct 8 43° 68° 25° (1987) 91° (2007) 0.1" 0"
Oct 9 43° 67° 27° (1987) 88° (2007) 0.09" 0"
Oct 10 42° 67° 25° (1964) 91° (2010) 0.1" 0"
Oct 11 42° 66° 25° (1987) 87° (2010) 0.1" 0"
Oct 12 42° 66° 24° (1988) 85° (2010) 0.1" 0"
Oct 13 41° 66° 23° (1988) 86° (1975) 0.1" 0"
Oct 14 41° 65° 29° (1993) 84° (1989) 0.1" 0"
Oct 15 41° 65° 26° (1972) 86° (1989) 0.09" 0"
Oct 16 41° 64° 26° (1970) 83° (1999) 0.1" 0"
Oct 17 40° 64° 25° (1970) 82° (1964) 0.1" 0"
Oct 18 40° 64° 20° (1976) 84° (1965) 0.09" 0"
Oct 19 40° 63° 16° (1972) 81° (1971) 0.11" 0"
Oct 20 40° 63° 23° (1992) 83° (1971) 0.09" 0"
Oct 21 39° 62° 26° (2002) 87° (1979) 0.1" 0"
Oct 22 39° 62° 23° (1976) 84° (1963) 0.11" 0"
Oct 23 39° 61° 24° (1969) 84° (1963) 0.1" 0"
Oct 24 39° 61° 19° (1981) 82° (1963) 0.1" 0"
Oct 25 38° 61° 23° (1999) 79° (1963) 0.1" 0.1"
Oct 26 38° 60° 23° (1979) 83° (1963) 0.1" 0"
Oct 27 38° 60° 23° (1969) 78° (2000) 0.1" 0"
Oct 28 38° 59° 16° (1976) 75° (1966) 0.11" 0"
Oct 29 37° 59° 23° (1988) 81° (1999) 0.1" 0"
Oct 30 37° 58° 16° (1988) 81° (1971) 0.11" 0"
Oct 31 37° 58° 23° (1988) 80° (1968) 0.1" 0"
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