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
May 1 42° 62° 33° (2005) 86° (2001) 0.12" NA
May 2 42° 62° 35° (1984) 90° (1992) 0.12" NA
May 3 42° 62° 28° (2004) 83° (2001) 0.12" NA
May 4 43° 63° 30° (2002) 87° (2001) 0.12" NA
May 5 43° 63° 35° (1983) 83° (1982) 0.12" NA
May 6 44° 64° 33° (1989) 86° (2000) 0.12" NA
May 7 44° 64° 30° (1989) 88° (2000) 0.12" NA
May 8 44° 64° 36° (1989) 81° (2007) 0.12" NA
May 9 45° 65° 34° (1983) 85° (2000) 0.11" NA
May 10 45° 65° 31° (1983) 87° (2004) 0.11" NA
May 11 45° 66° 35° (1990) 86° (1987) 0.11" NA
May 12 45° 66° 36° (1996) 87° (1987) 0.11" NA
May 13 46° 66° 31° (1996) 89° (2000) 0.11" NA
May 14 46° 67° 31° (1988) 86° (1991) 0.11" NA
May 15 46° 67° 38° (1992) 90° (2007) 0.11" NA
May 16 47° 67° 32° (1997) 90° (2001) 0.11" NA
May 17 47° 68° 32° (1997) 88° (1992) 0.11" NA
May 18 47° 68° 33° (2002) 89° (1987) 0.11" NA
May 19 48° 69° 35° (2002) 92° (1996) 0.11" NA
May 20 48° 69° 36° (2006) 91° (1996) 0.11" NA
May 21 48° 69° 29° (2002) 88° (2004) 0.11" NA
May 22 49° 70° 34° (1997) 89° (1987) 0.12" NA
May 23 49° 70° 36° (2006) 89° (1994) 0.12" NA
May 24 49° 70° 39° (1992) 88° (2007) 0.12" NA
May 25 50° 71° 33° (1992) 88° (2007) 0.12" NA
May 26 50° 71° 35° (1983) 85° (1985) 0.12" NA
May 27 50° 71° 31° (1994) 90° (1985) 0.12" NA
May 28 51° 72° 33° (1992) 89° (1991) 0.12" NA
May 29 51° 72° 38° (1992) 93° (1991) 0.12" NA
May 30 51° 73° 36° (1996) 92° (2006) 0.12" NA
May 31 51° 73° 35° (1990) 92° (1994) 0.12" NA
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