Vandalia, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 20° 36° -21° (1985) 69° (1997) 2.63" 4.4"
February 24° 42° -16° (1996) 77° (2000) 2.64" 2.9"
March 33° 53° -9° (1978) 84° (1985) 3.24" 1.6"
April 43° 65° 20° (1983) 89° (1987) 3.7" 0.2"
May 53° 74° 31° (1976) 92° (2006) 5" 0"
June 63° 84° 41° (1992) 101° (1988) 4.15" 0"
July 67° 87° 49° (1975) 104° (1980) 3.6" 0"
August 64° 86° 43° (1986) 104° (1983) 3.2" 0"
September 55° 79° 30° (1995) 98° (1983) 2.85" 0"
October 43° 67° 22° (1979) 91° (2007) 3.24" 0"
November 35° 54° 5° (1977) 81° (2003) 4.02" 0.4"
December 24° 40° -17° (1989) 72° (1982) 3.09" 2.7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 61° 84° 47° (1987) 96° (1980) 0.1" 0"
Sep 2 61° 84° 49° (1994) 92° (1977) 0.09" 0"
Sep 3 61° 84° 47° (1974) 94° (1984) 0.09" 0"
Sep 4 60° 84° 44° (1974) 95° (2007) 0.09" 0"
Sep 5 60° 83° 40° (1997) 96° (2007) 0.09" 0"
Sep 6 60° 83° 48° (1988) 96° (1990) 0.1" 0"
Sep 7 59° 83° 49° (1975) 97° (1990) 0.09" 0"
Sep 8 59° 82° 40° (1986) 93° (2002) 0.08" 0"
Sep 9 58° 82° 42° (1986) 97° (1983) 0.09" 0"
Sep 10 58° 82° 45° (1976) 98° (1983) 0.09" 0"
Sep 11 57° 81° 46° (1993) 97° (1983) 0.09" 0"
Sep 12 57° 81° 47° (1976) 90° (1991) 0.09" 0"
Sep 13 56° 81° 42° (1975) 92° (1980) 0.1" 0"
Sep 14 56° 80° 42° (1974) 95° (1991) 0.09" 0"
Sep 15 56° 80° 40° (2007) 94° (1991) 0.1" 0"
Sep 16 55° 79° 39° (1979) 94° (1991) 0.1" 0"
Sep 17 55° 79° 41° (1984) 90° (1997) 0.09" 0"
Sep 18 54° 78° 42° (1990) 90° (1978) 0.09" 0"
Sep 19 54° 78° 40° (1991) 95° (1983) 0.1" 0"
Sep 20 53° 78° 35° (1991) 93° (1978) 0.09" 0"
Sep 21 53° 77° 36° (1991) 91° (1978) 0.1" 0"
Sep 22 52° 77° 35° (1983) 92° (1980) 0.09" 0"
Sep 23 52° 76° 30° (1974) 93° (2005) 0.1" 0"
Sep 24 51° 76° 30° (1995) 95° (2007) 0.09" 0"
Sep 25 51° 75° 34° (1995) 91° (2007) 0.11" 0"
Sep 26 50° 75° 36° (1984) 90° (1986) 0.1" 0"
Sep 27 50° 75° 36° (1984) 90° (1986) 0.1" 0"
Sep 28 49° 74° 38° (1991) 89° (1998) 0.11" 0"
Sep 29 49° 74° 38° (1984) 91° (1986) 0.1" 0"
Sep 30 48° 73° 35° (1984) 88° (1986) 0.1" 0"
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