Great Lakes, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 12° 28° -27° (1985) 64° (1989) 1.6" NA
February 17° 33° -22° (1996) 71° (2000) 1.45" NA
March 26° 43° -12° (1962) 81° (1986) 2.15" NA
April 36° 55° 8° (1982) 90° (1980) 3.73" NA
May 46° 67° 24° (1966) 93° (1987) 3.44" NA
June 55° 77° 34° (1992) 101° (1988) 3.62" NA
July 61° 82° 45° (2001) 102° (1995) 3.49" NA
August 61° 80° 40° (1986) 102° (1988) 4.22" NA
September 52° 73° 29° (1974) 100° (1953) 3.4" NA
October 41° 62° 18° (1981) 90° (1963) 2.42" NA
November 30° 47° -5° (1950) 79° (1950) 2.57" NA
December 18° 34° -23° (1983) 69° (2001) 2.05" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 59° 81° 45° (1965) 95° (1953) 0.12" NA
Jul 2 60° 81° 45° (2001) 95° (1952) 0.11" NA
Jul 3 60° 81° 48° (1986) 96° (1949) 0.11" NA
Jul 4 60° 81° 47° (1972) 97° (1949) 0.11" NA
Jul 5 60° 81° 45° (1972) 97° (1990) 0.11" NA
Jul 6 60° 81° 45° (1965) 96° (1988) 0.11" NA
Jul 7 60° 81° 47° (1979) 96° (1977) 0.11" NA
Jul 8 61° 81° 48° (1979) 98° (1980) 0.11" NA
Jul 9 61° 81° 51° (1952) 96° (1989) 0.11" NA
Jul 10 61° 82° 50° (1953) 97° (1974) 0.11" NA
Jul 11 61° 82° 48° (1968) 97° (1989) 0.11" NA
Jul 12 61° 82° 51° (1975) 95° (1954) 0.11" NA
Jul 13 61° 82° 51° (1964) 94° (1995) 0.11" NA
Jul 14 61° 82° 46° (1950) 102° (1995) 0.11" NA
Jul 15 62° 82° 48° (1987) 100° (1995) 0.11" NA
Jul 16 62° 82° 48° (1987) 96° (1995) 0.11" NA
Jul 17 62° 82° 52° (1976) 94° (1997) 0.11" NA
Jul 18 62° 82° 47° (1979) 97° (1966) 0.11" NA
Jul 19 62° 82° 47° (1979) 96° (1991) 0.11" NA
Jul 20 62° 82° 51° (1951) 97° (1991) 0.11" NA
Jul 21 62° 82° 48° (1950) 100° (1991) 0.11" NA
Jul 22 62° 82° 49° (1970) 98° (1983) 0.11" NA
Jul 23 62° 82° 51° (2000) 96° (1965) 0.11" NA
Jul 24 62° 82° 50° (2000) 94° (1999) 0.11" NA
Jul 25 62° 82° 51° (1978) 94° (1999) 0.12" NA
Jul 26 62° 82° 48° (1977) 99° (1955) 0.12" NA
Jul 27 62° 82° 48° (1977) 100° (1955) 0.12" NA
Jul 28 62° 82° 50° (1977) 95° (1988) 0.12" NA
Jul 29 62° 82° 50° (1981) 96° (1983) 0.12" NA
Jul 30 62° 82° 49° (1981) 97° (1999) 0.12" NA
Jul 31 62° 82° 50° (1971) 101° (1999) 0.12" NA
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