Granite City, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 24° 40° -10° (1977) 74° (1970) 2.45" NA
February 28° 45° -13° (1996) 79° (1976) 2.48" NA
March 37° 55° 2° (1978) 88° (1997) 3.36" NA
April 47° 67° 20° (1975) 93° (2006) 4.1" NA
May 57° 77° 34° (1978) 95° (1996) 4.8" NA
June 67° 85° 40° (1976) 102° (1988) 4.34" NA
July 71° 89° 53° (1975) 105° (1999) 4.19" NA
August 70° 88° 51° (1992) 104° (2003) 3.41" NA
September 61° 81° 35° (1969) 99° (1990) 3.38" NA
October 50° 69° 28° (1987) 94° (2006) 3.43" NA
November 39° 56° 7° (1976) 83° (2003) 4.22" NA
December 28° 43° -17° (1989) 78° (1970) 2.96" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 53° 72° 38° (1994) 91° (2007) 0.14" NA
May 2 53° 73° 39° (1994) 89° (1987) 0.15" NA
May 3 53° 73° 36° (1976) 83° (2010) 0.15" NA
May 4 54° 73° 40° (1976) 87° (1987) 0.16" NA
May 5 54° 74° 40° (1990) 90° (2010) 0.16" NA
May 6 54° 74° 38° (1976) 87° (1977) 0.16" NA
May 7 55° 74° 37° (1989) 90° (2004) 0.15" NA
May 8 55° 74° 38° (1989) 87° (1970) 0.15" NA
May 9 55° 75° 44° (1976) 88° (1970) 0.15" NA
May 10 55° 75° 41° (1978) 89° (1996) 0.15" NA
May 11 56° 75° 42° (1989) 88° (2005) 0.15" NA
May 12 56° 76° 42° (1989) 88° (1987) 0.16" NA
May 13 56° 76° 43° (2006) 88° (1970) 0.16" NA
May 14 57° 76° 40° (1975) 87° (1987) 0.16" NA
May 15 57° 77° 46° (2005) 91° (1987) 0.15" NA
May 16 57° 77° 40° (1997) 90° (1987) 0.15" NA
May 17 58° 77° 46° (2009) 90° (1977) 0.15" NA
May 18 58° 77° 47° (1976) 92° (1996) 0.15" NA
May 19 58° 78° 48° (1976) 95° (1996) 0.14" NA
May 20 59° 78° 47° (1997) 94° (1996) 0.16" NA
May 21 59° 78° 47° (1993) 93° (1987) 0.15" NA
May 22 59° 79° 49° (1997) 93° (1987) 0.15" NA
May 23 60° 79° 48° (1997) 92° (1975) 0.14" NA
May 24 60° 79° 49° (1992) 93° (1975) 0.16" NA
May 25 60° 80° 46° (1988) 92° (2006) 0.15" NA
May 26 61° 80° 46° (1988) 91° (1977) 0.16" NA
May 27 61° 80° 46° (1992) 91° (1972) 0.17" NA
May 28 61° 80° 41° (1992) 93° (1991) 0.16" NA
May 29 62° 81° 54° (2008) 94° (2006) 0.17" NA
May 30 62° 81° 50° (1992) 93° (2006) 0.17" NA
May 31 62° 81° 51° (1972) 93° (1989) 0.17" NA
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