Wilmington, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 17° 31° -26° (1985) 65° (1997) 1.8" NA
February 21° 36° -20° (1979) 73° (2000) 1.79" NA
March 29° 47° -7° (2002) 86° (1986) 2.25" NA
April 39° 61° 11° (1982) 92° (1986) 3.49" NA
May 49° 71° 30° (2005) 93° (2006) 4.08" NA
June 60° 81° 35° (1985) 104° (1988) 3.88" NA
July 64° 84° 47° (1983) 103° (1995) 4.33" NA
August 63° 82° 39° (1986) 102° (1988) 4.16" NA
September 55° 76° 32° (1983) 97° (1978) 3.01" NA
October 43° 64° 17° (1976) 88° (2007) 2.84" NA
November 33° 49° -2° (1977) 78° (1978) 3.06" NA
December 21° 35° -20° (1983) 70° (1982) 2.2" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 61° 81° 47° (2009) 92° (2000) 0.11" NA
Sep 2 60° 81° 48° (2009) 95° (1984) 0.11" NA
Sep 3 60° 81° 46° (2009) 93° (2000) 0.11" NA
Sep 4 60° 80° 46° (2009) 91° (1999) 0.11" NA
Sep 5 59° 80° 47° (1982) 93° (1999) 0.11" NA
Sep 6 59° 80° 45° (1988) 92° (1983) 0.12" NA
Sep 7 59° 80° 40° (1986) 95° (1990) 0.12" NA
Sep 8 58° 79° 38° (1986) 93° (1978) 0.11" NA
Sep 9 58° 79° 37° (1986) 97° (1978) 0.11" NA
Sep 10 57° 79° 40° (1986) 95° (1978) 0.1" NA
Sep 11 57° 78° 45° (1993) 95° (1978) 0.11" NA
Sep 12 56° 78° 45° (1993) 94° (2000) 0.1" NA
Sep 13 56° 78° 45° (1985) 95° (1991) 0.1" NA
Sep 14 55° 77° 43° (1985) 94° (1991) 0.1" NA
Sep 15 55° 77° 41° (2007) 91° (1994) 0.09" NA
Sep 16 55° 77° 41° (1984) 90° (1994) 0.1" NA
Sep 17 54° 76° 41° (1984) 87° (1994) 0.09" NA
Sep 18 54° 76° 42° (1981) 92° (1988) 0.09" NA
Sep 19 53° 75° 39° (1991) 89° (2000) 0.1" NA
Sep 20 53° 75° 39° (1991) 92° (1978) 0.1" NA
Sep 21 52° 74° 37° (1983) 90° (1978) 0.1" NA
Sep 22 52° 74° 33° (1983) 89° (2007) 0.09" NA
Sep 23 51° 74° 32° (1983) 90° (2005) 0.1" NA
Sep 24 51° 73° 32° (1983) 89° (2010) 0.09" NA
Sep 25 50° 73° 35° (1983) 90° (2007) 0.1" NA
Sep 26 50° 72° 36° (1991) 90° (1986) 0.09" NA
Sep 27 49° 72° 36° (1991) 91° (1998) 0.1" NA
Sep 28 49° 71° 40° (1981) 87° (1986) 0.08" NA
Sep 29 48° 71° 36° (1984) 85° (1986) 0.09" NA
Sep 30 48° 71° 34° (1984) 86° (2002) 0.08" NA
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