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
Oct 1 47° 68° 31° (1993) 89° (1971) 0.09" NA
Oct 2 46° 67° 28° (1974) 89° (1971) 0.09" NA
Oct 3 46° 67° 27° (1974) 88° (1954) 0.09" NA
Oct 4 45° 67° 30° (1974) 88° (1951) 0.09" NA
Oct 5 45° 66° 32° (1950) 81° (1963) 0.08" NA
Oct 6 45° 66° 25° (1952) 90° (1963) 0.08" NA
Oct 7 44° 66° 27° (2001) 87° (1997) 0.08" NA
Oct 8 44° 65° 29° (1952) 85° (1949) 0.08" NA
Oct 9 43° 65° 29° (1987) 84° (1949) 0.08" NA
Oct 10 43° 64° 24° (1964) 84° (1962) 0.08" NA
Oct 11 43° 64° 27° (1987) 85° (1962) 0.08" NA
Oct 12 42° 63° 27° (1988) 83° (1956) 0.08" NA
Oct 13 42° 63° 29° (1977) 83° (1956) 0.08" NA
Oct 14 42° 63° 26° (1979) 86° (1975) 0.08" NA
Oct 15 41° 62° 29° (1979) 85° (1962) 0.07" NA
Oct 16 41° 62° 28° (1952) 82° (1950) 0.07" NA
Oct 17 40° 61° 28° (1992) 82° (1956) 0.07" NA
Oct 18 40° 61° 24° (1952) 86° (1950) 0.07" NA
Oct 19 40° 60° 23° (1992) 84° (1953) 0.07" NA
Oct 20 39° 60° 23° (1972) 86° (1953) 0.07" NA
Oct 21 39° 60° 23° (1952) 78° (1953) 0.07" NA
Oct 22 39° 59° 24° (1982) 82° (1953) 0.07" NA
Oct 23 38° 59° 23° (1982) 83° (1963) 0.07" NA
Oct 24 38° 58° 18° (1981) 81° (1963) 0.07" NA
Oct 25 38° 58° 18° (1981) 78° (1973) 0.08" NA
Oct 26 37° 57° 20° (1962) 82° (1963) 0.08" NA
Oct 27 37° 57° 24° (1979) 75° (1955) 0.08" NA
Oct 28 37° 56° 25° (1959) 72° (1989) 0.08" NA
Oct 29 36° 56° 21° (1988) 77° (1950) 0.08" NA
Oct 30 36° 55° 20° (1988) 84° (1950) 0.08" NA
Oct 31 35° 55° 23° (1993) 84° (1950) 0.08" NA
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