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
Jan 1 15° 31° -4° (2001) 56° (2005) 0.06" NA
Jan 2 15° 31° 0° (1985) 54° (2005) 0.06" NA
Jan 3 15° 31° -4° (1985) 62° (2000) 0.06" NA
Jan 4 15° 30° -2° (1999) 57° (1998) 0.06" NA
Jan 5 14° 30° -16° (1999) 63° (1997) 0.06" NA
Jan 6 14° 30° -13° (1988) 51° (1998) 0.06" NA
Jan 7 14° 30° -12° (1988) 47° (1987) 0.06" NA
Jan 8 14° 30° -7° (1994) 51° (1989) 0.06" NA
Jan 9 14° 30° -10° (1994) 55° (2003) 0.07" NA
Jan 10 14° 30° -27° (1982) 56° (2002) 0.07" NA
Jan 11 14° 30° -25° (1982) 46° (2000) 0.07" NA
Jan 12 13° 30° -7° (1997) 47° (1995) 0.06" NA
Jan 13 13° 30° -5° (1997) 60° (2005) 0.06" NA
Jan 14 13° 30° -10° (1994) 47° (1996) 0.06" NA
Jan 15 13° 30° -19° (1994) 47° (1996) 0.06" NA
Jan 16 13° 29° -16° (1994) 54° (1990) 0.06" NA
Jan 17 13° 30° -19° (1982) 55° (1990) 0.06" NA
Jan 18 13° 30° -22° (1994) 59° (1996) 0.06" NA
Jan 19 13° 30° -22° (1994) 60° (1996) 0.06" NA
Jan 20 13° 30° -26° (1985) 55° (2006) 0.06" NA
Jan 21 13° 30° -20° (1985) 43° (1999) 0.06" NA
Jan 22 13° 30° -2° (2000) 52° (1986) 0.06" NA
Jan 23 13° 30° -5° (1987) 56° (2002) 0.06" NA
Jan 24 13° 30° -5° (1987) 51° (1989) 0.06" NA
Jan 25 14° 30° -3° (1982) 48° (1990) 0.06" NA
Jan 26 14° 30° -8° (1982) 52° (2002) 0.06" NA
Jan 27 14° 30° -6° (2003) 54° (2002) 0.06" NA
Jan 28 14° 31° -4° (1997) 62° (2002) 0.06" NA
Jan 29 14° 31° -6° (1997) 50° (2006) 0.06" NA
Jan 30 14° 31° -9° (2004) 50° (1988) 0.06" NA
Jan 31 14° 31° -12° (1996) 56° (1988) 0.06" NA
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