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
Dec 1 24° 40° 3° (1976) 61° (1970) 0.08" NA
Dec 2 23° 39° 0° (1976) 64° (1962) 0.08" NA
Dec 3 23° 39° -3° (1976) 65° (1982) 0.08" NA
Dec 4 23° 38° 4° (1977) 66° (1998) 0.08" NA
Dec 5 22° 38° 3° (1991) 64° (1998) 0.07" NA
Dec 6 22° 37° 1° (1964) 69° (2001) 0.07" NA
Dec 7 21° 37° -4° (1972) 62° (1951) 0.07" NA
Dec 8 21° 36° -3° (1972) 59° (1966) 0.07" NA
Dec 9 21° 36° -13° (1958) 59° (1952) 0.07" NA
Dec 10 20° 36° -9° (1978) 53° (1990) 0.07" NA
Dec 11 20° 35° -12° (1977) 60° (1949) 0.07" NA
Dec 12 19° 35° -8° (1962) 57° (1949) 0.07" NA
Dec 13 19° 35° -6° (2000) 60° (1991) 0.07" NA
Dec 14 19° 34° -10° (1985) 61° (1975) 0.07" NA
Dec 15 18° 34° -12° (1989) 59° (1975) 0.07" NA
Dec 16 18° 33° -13° (1951) 60° (1971) 0.06" NA
Dec 17 18° 33° -10° (1951) 54° (1984) 0.06" NA
Dec 18 17° 33° -9° (1985) 53° (1957) 0.06" NA
Dec 19 17° 33° -16° (1983) 54° (1957) 0.06" NA
Dec 20 17° 32° -14° (1983) 57° (1949) 0.06" NA
Dec 21 16° 32° -16° (1989) 58° (1967) 0.06" NA
Dec 22 16° 32° -13° (1989) 55° (1957) 0.06" NA
Dec 23 16° 31° -16° (1983) 53° (1957) 0.06" NA
Dec 24 16° 31° -23° (1983) 58° (1982) 0.06" NA
Dec 25 15° 31° -14° (1983) 59° (1982) 0.06" NA
Dec 26 15° 31° -11° (1985) 60° (1982) 0.06" NA
Dec 27 15° 30° -12° (1950) 52° (1994) 0.06" NA
Dec 28 14° 30° -8° (1961) 61° (1982) 0.06" NA
Dec 29 14° 30° -6° (1983) 65° (1984) 0.06" NA
Dec 30 14° 30° -7° (1963) 52° (1965) 0.06" NA
Dec 31 14° 30° -12° (1968) 58° (1965) 0.06" NA
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