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
Apr 1 33° 50° 24° (1984) 84° (1986) 0.11" NA
Apr 2 33° 51° 23° (1992) 78° (2003) 0.11" NA
Apr 3 33° 51° 20° (1987) 76° (1999) 0.11" NA
Apr 4 33° 51° 18° (1982) 75° (1999) 0.11" NA
Apr 5 34° 52° 16° (1995) 76° (1997) 0.12" NA
Apr 6 34° 52° 17° (1982) 83° (1988) 0.12" NA
Apr 7 34° 53° 10° (1982) 84° (1991) 0.12" NA
Apr 8 34° 53° 19° (1996) 85° (2001) 0.12" NA
Apr 9 35° 53° 20° (1997) 78° (2001) 0.12" NA
Apr 10 35° 54° 19° (1989) 71° (1987) 0.12" NA
Apr 11 35° 54° 24° (1989) 74° (1987) 0.12" NA
Apr 12 36° 54° 25° (1990) 82° (1996) 0.12" NA
Apr 13 36° 55° 23° (1989) 76° (1985) 0.13" NA
Apr 14 36° 55° 27° (1997) 78° (2006) 0.13" NA
Apr 15 37° 56° 27° (2007) 85° (2003) 0.13" NA
Apr 16 37° 56° 26° (1983) 89° (2002) 0.13" NA
Apr 17 37° 56° 27° (1983) 88° (2002) 0.13" NA
Apr 18 38° 57° 24° (1997) 86° (2002) 0.13" NA
Apr 19 38° 57° 24° (1983) 90° (2002) 0.13" NA
Apr 20 38° 58° 26° (1983) 85° (1985) 0.13" NA
Apr 21 38° 58° 27° (1988) 85° (1987) 0.13" NA
Apr 22 39° 58° 27° (1986) 85° (1985) 0.13" NA
Apr 23 39° 59° 24° (1986) 83° (2007) 0.13" NA
Apr 24 39° 59° 30° (1995) 79° (1985) 0.13" NA
Apr 25 40° 59° 28° (1983) 87° (1994) 0.13" NA
Apr 26 40° 60° 29° (2006) 87° (1990) 0.13" NA
Apr 27 40° 60° 29° (1996) 88° (1986) 0.12" NA
Apr 28 41° 61° 26° (1992) 88° (1990) 0.12" NA
Apr 29 41° 61° 30° (1988) 80° (2004) 0.12" NA
Apr 30 41° 61° 33° (1988) 84° (2007) 0.12" NA
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