Custer Park, 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
Jul 1 64° 84° 52° (1976) 93° (1991) 0.11" NA
Jul 2 64° 84° 53° (1995) 92° (1991) 0.11" NA
Jul 3 64° 85° 50° (2001) 94° (2003) 0.1" NA
Jul 4 64° 85° 54° (1988) 93° (2002) 0.11" NA
Jul 5 64° 85° 52° (1997) 96° (1977) 0.13" NA
Jul 6 64° 85° 47° (1983) 97° (1988) 0.13" NA
Jul 7 64° 85° 48° (1983) 97° (1988) 0.14" NA
Jul 8 64° 85° 51° (1983) 98° (1980) 0.13" NA
Jul 9 64° 85° 55° (1984) 97° (1988) 0.14" NA
Jul 10 64° 85° 54° (1996) 97° (1984) 0.12" NA
Jul 11 64° 85° 52° (1978) 99° (1976) 0.14" NA
Jul 12 64° 85° 55° (1978) 96° (1976) 0.14" NA
Jul 13 64° 85° 54° (1976) 98° (1981) 0.13" NA
Jul 14 64° 85° 55° (2005) 103° (1995) 0.14" NA
Jul 15 64° 85° 52° (1989) 101° (1976) 0.14" NA
Jul 16 64° 84° 54° (1987) 100° (1988) 0.14" NA
Jul 17 64° 84° 52° (1976) 94° (1988) 0.15" NA
Jul 18 64° 84° 50° (1979) 96° (1986) 0.15" NA
Jul 19 64° 84° 48° (2009) 98° (1991) 0.14" NA
Jul 20 64° 84° 48° (2009) 96° (1983) 0.14" NA
Jul 21 64° 84° 48° (2009) 98° (1980) 0.16" NA
Jul 22 64° 84° 54° (1981) 100° (1991) 0.16" NA
Jul 23 64° 84° 49° (2009) 101° (1983) 0.15" NA
Jul 24 64° 84° 54° (2003) 94° (1999) 0.16" NA
Jul 25 64° 84° 54° (2003) 99° (1986) 0.16" NA
Jul 26 64° 84° 53° (1977) 95° (1987) 0.15" NA
Jul 27 64° 84° 50° (1977) 98° (1997) 0.15" NA
Jul 28 63° 84° 55° (1977) 94° (1988) 0.15" NA
Jul 29 63° 83° 51° (1981) 100° (1983) 0.15" NA
Jul 30 63° 83° 53° (1981) 97° (1999) 0.15" NA
Jul 31 63° 83° 55° (1978) 101° (1999) 0.16" NA
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