Alton, Missouri
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 22° 45° -18° (1977) 76° (2002) 2.72" NA
February 25° 50° -10° (1982) 82° (1996) 3.2" NA
March 34° 59° 3° (1980) 90° (1967) 3.96" NA
April 43° 70° 15° (2007) 92° (1980) 4.34" NA
May 53° 77° 28° (1976) 94° (2000) 4.79" NA
June 61° 85° 40° (1969) 100° (1978) 3.02" NA
July 66° 90° 46° (1975) 105° (1966) 3.79" NA
August 64° 89° 45° (1973) 105° (2000) 2.68" NA
September 55° 82° 31° (1967) 103° (2000) 3.98" NA
October 44° 71° 16° (1981) 94° (1979) 3.95" NA
November 34° 59° 1° (1976) 85° (1980) 4.82" NA
December 24° 47° -6° (1976) 76° (2001) 3.97" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 61° 87° 49° (1976) 101° (2000) 0.12" NA
Sep 2 61° 86° 45° (1965) 100° (1980) 0.13" NA
Sep 3 60° 86° 46° (1965) 100° (2000) 0.13" NA
Sep 4 60° 86° 41° (1974) 103° (2000) 0.12" NA
Sep 5 60° 86° 43° (1997) 100° (1999) 0.13" NA
Sep 6 59° 85° 44° (1997) 98° (1983) 0.12" NA
Sep 7 59° 85° 44° (1997) 100° (1980) 0.13" NA
Sep 8 58° 84° 46° (1979) 98° (1980) 0.12" NA
Sep 9 58° 84° 45° (1979) 100° (1980) 0.13" NA
Sep 10 58° 84° 40° (1969) 100° (1980) 0.15" NA
Sep 11 57° 83° 37° (1976) 95° (1983) 0.14" NA
Sep 12 57° 83° 39° (1976) 96° (2000) 0.15" NA
Sep 13 56° 83° 42° (1975) 99° (1980) 0.15" NA
Sep 14 56° 82° 38° (1979) 100° (1980) 0.15" NA
Sep 15 56° 82° 36° (1979) 97° (2000) 0.14" NA
Sep 16 55° 81° 36° (1979) 92° (1980) 0.14" NA
Sep 17 55° 81° 34° (1981) 100° (1980) 0.13" NA
Sep 18 54° 81° 34° (1981) 94° (1972) 0.12" NA
Sep 19 54° 80° 36° (1981) 92° (1972) 0.12" NA
Sep 20 53° 80° 36° (1981) 95° (2000) 0.12" NA
Sep 21 53° 79° 37° (1983) 95° (2000) 0.11" NA
Sep 22 52° 79° 32° (1983) 92° (1980) 0.13" NA
Sep 23 52° 79° 32° (1995) 91° (2007) 0.13" NA
Sep 24 52° 78° 32° (1983) 90° (2007) 0.12" NA
Sep 25 51° 78° 32° (1983) 90° (1999) 0.13" NA
Sep 26 51° 78° 35° (1975) 93° (1998) 0.14" NA
Sep 27 50° 77° 36° (2001) 91° (1981) 0.14" NA
Sep 28 50° 77° 38° (1967) 94° (1998) 0.15" NA
Sep 29 49° 76° 31° (1967) 93° (1998) 0.15" NA
Sep 30 49° 76° 34° (2003) 96° (1998) 0.14" NA
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