Half Day, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 14° 30° -27° (1982) 63° (1997) 1.89" NA
February 18° 35° -20° (1996) 74° (2000) 1.56" NA
March 28° 45° -5° (2002) 83° (1986) 2.5" NA
April 37° 56° 10° (1982) 90° (2002) 3.7" NA
May 47° 67° 28° (2004) 93° (1991) 3.59" NA
June 56° 78° 37° (1993) 102° (1988) 3.86" NA
July 63° 83° 45° (1982) 105° (1995) 3.5" NA
August 62° 81° 42° (1986) 101° (1991) 4.84" NA
September 54° 75° 30° (1995) 97° (1990) 3.24" NA
October 42° 63° 24° (1992) 89° (2007) 2.7" NA
November 32° 49° 6° (1986) 76° (1999) 3.22" NA
December 20° 36° -20° (1983) 70° (2001) 2.2" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Aug 1 64° 83° 50° (1990) 100° (2006) 0.14" NA
Aug 2 63° 83° 56° (1990) 101° (1988) 0.14" NA
Aug 3 63° 83° 55° (1985) 101° (1991) 0.15" NA
Aug 4 63° 83° 53° (1992) 99° (1988) 0.15" NA
Aug 5 63° 83° 51° (1992) 98° (1988) 0.15" NA
Aug 6 63° 83° 48° (1994) 93° (1996) 0.15" NA
Aug 7 63° 83° 49° (1990) 95° (1984) 0.16" NA
Aug 8 63° 83° 51° (1989) 97° (2001) 0.16" NA
Aug 9 63° 82° 54° (1990) 99° (1988) 0.16" NA
Aug 10 63° 82° 54° (1994) 96° (2001) 0.16" NA
Aug 11 63° 82° 49° (1982) 93° (2002) 0.16" NA
Aug 12 63° 82° 47° (2004) 95° (1988) 0.16" NA
Aug 13 62° 82° 52° (1986) 96° (1988) 0.16" NA
Aug 14 62° 82° 51° (1984) 97° (1995) 0.16" NA
Aug 15 62° 82° 47° (2004) 97° (1995) 0.16" NA
Aug 16 62° 81° 50° (1992) 93° (2000) 0.17" NA
Aug 17 62° 81° 49° (1992) 101° (1988) 0.17" NA
Aug 18 62° 81° 52° (2002) 100° (1988) 0.16" NA
Aug 19 62° 81° 51° (1992) 92° (1990) 0.16" NA
Aug 20 61° 81° 49° (1992) 97° (1983) 0.16" NA
Aug 21 61° 81° 50° (1992) 93° (2003) 0.16" NA
Aug 22 61° 80° 48° (2004) 98° (2003) 0.16" NA
Aug 23 61° 80° 50° (2004) 93° (2007) 0.16" NA
Aug 24 61° 80° 51° (1986) 92° (1993) 0.16" NA
Aug 25 60° 80° 52° (1984) 90° (1994) 0.16" NA
Aug 26 60° 80° 54° (1984) 94° (1994) 0.16" NA
Aug 27 60° 80° 54° (1986) 95° (1993) 0.15" NA
Aug 28 60° 79° 44° (1986) 95° (1990) 0.15" NA
Aug 29 59° 79° 42° (1986) 96° (1984) 0.15" NA
Aug 30 59° 79° 46° (1986) 96° (1984) 0.15" NA
Aug 31 59° 79° 52° (1984) 93° (1995) 0.14" NA
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