Chatsworth, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 13° 31° -25° (1985) 66° (2005) 1.91" NA
February 18° 37° -20° (1996) 74° (2000) 1.8" NA
March 28° 49° -4° (2002) 86° (1981) 2.77" NA
April 38° 62° 7° (1982) 93° (1986) 3.35" NA
May 49° 74° 25° (1971) 97° (1991) 4.04" NA
June 59° 84° 37° (1972) 106° (1988) 3.83" NA
July 62° 86° 42° (1972) 105° (1988) 4.22" NA
August 59° 84° 37° (1986) 108° (1988) 3.81" NA
September 51° 78° 26° (1995) 98° (1990) 2.91" NA
October 40° 66° 17° (1981) 91° (2007) 2.58" NA
November 30° 49° 0° (1977) 80° (2000) 3.08" NA
December 19° 36° -23° (1983) 70° (1982) 2.53" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 25° 42° 8° (2002) 68° (1970) 0.1" NA
Dec 2 24° 41° 5° (1976) 70° (1982) 0.1" NA
Dec 3 24° 41° 5° (1976) 68° (1970) 0.09" NA
Dec 4 24° 40° -1° (1991) 63° (2001) 0.09" NA
Dec 5 23° 40° 0° (1991) 68° (1998) 0.09" NA
Dec 6 23° 39° -4° (1977) 68° (2001) 0.09" NA
Dec 7 22° 39° -6° (1977) 64° (1998) 0.09" NA
Dec 8 22° 39° 0° (1976) 59° (1980) 0.09" NA
Dec 9 22° 38° -6° (1977) 66° (1991) 0.09" NA
Dec 10 21° 38° -9° (1977) 62° (1971) 0.09" NA
Dec 11 21° 38° -8° (1977) 60° (1979) 0.09" NA
Dec 12 21° 37° -4° (1989) 60° (1990) 0.09" NA
Dec 13 20° 37° -12° (1989) 62° (1975) 0.08" NA
Dec 14 20° 36° -4° (1989) 64° (1975) 0.08" NA
Dec 15 20° 36° -5° (1989) 62° (1971) 0.08" NA
Dec 16 19° 36° -11° (1989) 64° (1984) 0.08" NA
Dec 17 19° 36° -11° (1985) 56° (2006) 0.08" NA
Dec 18 19° 35° -9° (1983) 53° (2002) 0.08" NA
Dec 19 18° 35° -15° (1983) 57° (1988) 0.08" NA
Dec 20 18° 35° -10° (1989) 60° (1988) 0.08" NA
Dec 21 18° 34° -15° (1989) 50° (1990) 0.08" NA
Dec 22 17° 34° -20° (1989) 56° (1984) 0.08" NA
Dec 23 17° 34° -20° (1989) 61° (1982) 0.07" NA
Dec 24 17° 34° -23° (1983) 60° (1982) 0.07" NA
Dec 25 17° 33° -15° (1983) 62° (1982) 0.07" NA
Dec 26 16° 33° -10° (1983) 55° (1982) 0.07" NA
Dec 27 16° 33° -7° (1990) 60° (1971) 0.07" NA
Dec 28 16° 33° 0° (2000) 63° (1984) 0.07" NA
Dec 29 15° 32° -10° (1981) 69° (1984) 0.07" NA
Dec 30 15° 32° -12° (1981) 62° (1984) 0.07" NA
Dec 31 15° 32° -15° (1976) 61° (2002) 0.07" NA
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