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
Apr 1 35° 55° 18° (1987) 85° (1986) 0.1" NA
Apr 2 35° 55° 25° (1987) 83° (2003) 0.11" NA
Apr 3 35° 55° 24° (1987) 79° (2010) 0.11" NA
Apr 4 36° 56° 20° (1982) 77° (1981) 0.1" NA
Apr 5 36° 56° 21° (1995) 77° (2005) 0.1" NA
Apr 6 36° 57° 15° (1982) 83° (1988) 0.11" NA
Apr 7 37° 57° 11° (1982) 82° (1991) 0.12" NA
Apr 8 37° 58° 15° (1982) 82° (2001) 0.11" NA
Apr 9 37° 58° 21° (1997) 82° (2001) 0.12" NA
Apr 10 38° 58° 21° (1989) 77° (2001) 0.11" NA
Apr 11 38° 59° 21° (1989) 83° (1977) 0.12" NA
Apr 12 38° 59° 25° (1990) 83° (1977) 0.12" NA
Apr 13 38° 60° 25° (1990) 83° (1977) 0.12" NA
Apr 14 39° 60° 28° (1989) 84° (2006) 0.11" NA
Apr 15 39° 61° 28° (1997) 84° (2003) 0.12" NA
Apr 16 39° 61° 27° (1980) 86° (2002) 0.12" NA
Apr 17 40° 61° 28° (1983) 87° (2002) 0.13" NA
Apr 18 40° 62° 25° (1983) 87° (1977) 0.12" NA
Apr 19 40° 62° 24° (1983) 89° (2002) 0.12" NA
Apr 20 41° 63° 25° (1983) 85° (1985) 0.12" NA
Apr 21 41° 63° 29° (1982) 87° (1987) 0.12" NA
Apr 22 41° 63° 25° (1986) 85° (1985) 0.12" NA
Apr 23 42° 64° 27° (1986) 90° (1980) 0.12" NA
Apr 24 42° 64° 32° (1980) 82° (1990) 0.11" NA
Apr 25 42° 65° 31° (1980) 87° (1990) 0.12" NA
Apr 26 43° 65° 31° (1976) 92° (1986) 0.12" NA
Apr 27 43° 65° 29° (1976) 91° (1986) 0.12" NA
Apr 28 43° 66° 30° (1976) 88° (1986) 0.12" NA
Apr 29 43° 66° 30° (1977) 78° (2004) 0.13" NA
Apr 30 44° 66° 34° (2008) 88° (1987) 0.12" NA
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