Granite City, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 21° 38° -10° (1977) 74° (1970) 2.01" NA
February 26° 45° -13° (1996) 79° (1976) 2.06" NA
March 36° 55° 2° (1978) 88° (1997) 3.7" NA
April 47° 66° 20° (1975) 93° (2006) 3.82" NA
May 57° 77° 34° (1978) 95° (1996) 3.92" NA
June 66° 86° 40° (1976) 102° (1988) 3.73" NA
July 71° 91° 53° (1975) 105° (1999) 3.78" NA
August 69° 88° 51° (1992) 104° (2003) 3.7" NA
September 61° 81° 35° (1969) 99° (1990) 2.69" NA
October 49° 69° 28° (1987) 94° (2006) 2.81" NA
November 38° 54° 7° (1976) 83° (2003) 4.06" NA
December 27° 42° -17° (1989) 78° (1970) 2.56" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 65° 85° 57° (1987) 94° (1969) 0.11" NA
Sep 2 65° 85° 53° (1974) 95° (1975) 0.1" NA
Sep 3 65° 84° 50° (1974) 96° (2002) 0.1" NA
Sep 4 64° 84° 50° (1974) 96° (1999) 0.1" NA
Sep 5 64° 84° 51° (1997) 97° (1990) 0.1" NA
Sep 6 64° 84° 48° (1988) 99° (1990) 0.1" NA
Sep 7 63° 83° 52° (1988) 99° (1990) 0.1" NA
Sep 8 63° 83° 53° (1987) 98° (1970) 0.1" NA
Sep 9 63° 83° 54° (1998) 95° (1971) 0.1" NA
Sep 10 63° 82° 54° (1969) 96° (1971) 0.09" NA
Sep 11 62° 82° 51° (1992) 95° (2002) 0.09" NA
Sep 12 62° 82° 53° (1968) 91° (1972) 0.09" NA
Sep 13 62° 82° 50° (1975) 93° (1971) 0.09" NA
Sep 14 61° 81° 47° (1996) 99° (1971) 0.09" NA
Sep 15 61° 81° 47° (2007) 93° (1994) 0.09" NA
Sep 16 61° 81° 51° (1993) 90° (1970) 0.09" NA
Sep 17 60° 80° 49° (1999) 93° (1997) 0.09" NA
Sep 18 60° 80° 45° (1973) 92° (1988) 0.09" NA
Sep 19 60° 80° 49° (1973) 94° (1972) 0.09" NA
Sep 20 59° 79° 44° (2006) 94° (1972) 0.08" NA
Sep 21 59° 79° 43° (1974) 92° (1972) 0.08" NA
Sep 22 59° 79° 40° (1995) 90° (1970) 0.08" NA
Sep 23 58° 79° 38° (1995) 92° (1988) 0.08" NA
Sep 24 58° 78° 38° (1995) 94° (2007) 0.08" NA
Sep 25 58° 78° 35° (1969) 90° (2007) 0.08" NA
Sep 26 57° 77° 47° (1975) 90° (1999) 0.08" NA
Sep 27 57° 77° 45° (1989) 91° (1998) 0.08" NA
Sep 28 56° 77° 43° (1989) 92° (1971) 0.08" NA
Sep 29 56° 76° 42° (2003) 93° (1971) 0.08" NA
Sep 30 56° 76° 41° (1992) 92° (1971) 0.08" NA
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