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) 1.4" 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
Aug 1 62° 82° 50° (1990) 102° (1988) 0.12" NA
Aug 2 62° 82° 53° (1965) 98° (1988) 0.13" NA
Aug 3 62° 82° 49° (1950) 98° (1988) 0.13" NA
Aug 4 62° 82° 49° (1951) 97° (1988) 0.13" NA
Aug 5 62° 82° 48° (1972) 91° (1965) 0.13" NA
Aug 6 62° 81° 47° (1994) 95° (1968) 0.13" NA
Aug 7 62° 81° 47° (1994) 93° (1988) 0.13" NA
Aug 8 62° 81° 49° (1976) 98° (1988) 0.13" NA
Aug 9 62° 81° 48° (1972) 96° (2001) 0.13" NA
Aug 10 62° 81° 48° (1972) 94° (2001) 0.14" NA
Aug 11 62° 81° 49° (1982) 94° (1988) 0.14" NA
Aug 12 61° 81° 46° (1967) 95° (1995) 0.14" NA
Aug 13 61° 81° 46° (1982) 94° (1995) 0.14" NA
Aug 14 61° 81° 49° (1963) 94° (1988) 0.14" NA
Aug 15 61° 80° 48° (1979) 98° (1988) 0.14" NA
Aug 16 61° 80° 43° (1979) 99° (1988) 0.14" NA
Aug 17 61° 80° 49° (1976) 100° (1988) 0.14" NA
Aug 18 61° 80° 46° (1963) 95° (1955) 0.14" NA
Aug 19 60° 80° 50° (1950) 98° (1983) 0.14" NA
Aug 20 60° 80° 43° (1950) 97° (1955) 0.14" NA
Aug 21 60° 80° 43° (1950) 100° (1955) 0.14" NA
Aug 22 60° 79° 50° (1949) 93° (1968) 0.14" NA
Aug 23 60° 79° 47° (1952) 94° (1968) 0.14" NA
Aug 24 59° 79° 46° (1951) 92° (1962) 0.14" NA
Aug 25 59° 79° 45° (1958) 95° (1953) 0.14" NA
Aug 26 59° 79° 46° (1977) 96° (1953) 0.14" NA
Aug 27 59° 78° 47° (1968) 96° (1953) 0.14" NA
Aug 28 58° 78° 41° (1986) 96° (1953) 0.14" NA
Aug 29 58° 78° 40° (1986) 97° (1953) 0.14" NA
Aug 30 58° 78° 40° (1986) 95° (1953) 0.13" NA
Aug 31 57° 77° 40° (1986) 100° (1953) 0.13" NA
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