Affton, Missouri
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -6° -23.3° (1977) 23.3° (1970) 2.01" NA
February -3° -25° (1996) 26.1° (1976) 2.06" NA
March 13° -16.7° (1978) 31.1° (1997) 3.7" NA
April 19° -6.7° (1975) 33.9° (2006) 3.82" NA
May 14° 25° 1.1° (1978) 35° (1996) 3.92" NA
June 19° 30° 4.4° (1976) 38.9° (1988) 3.73" NA
July 22° 33° 11.7° (1975) 40.6° (1999) 3.78" NA
August 21° 31° 10.6° (1992) 40° (2003) 3.7" NA
September 16° 27° 1.7° (1969) 37.2° (1990) 2.69" NA
October 21° -2.2° (1987) 34.4° (2006) 2.81" NA
November 12° -13.9° (1976) 28.3° (2003) 4.06" NA
December -3° -27.2° (1989) 25.6° (1970) 2.56" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Oct 1 12.8° 24.4° 4° (2003) 34° (1971) 0.08" NA
Oct 2 12.8° 23.9° 2° (1974) 33° (1971) 0.08" NA
Oct 3 12.8° 23.9° 2° (1974) 33° (2002) 0.08" NA
Oct 4 12.2° 23.9° 5° (1974) 34.4° (2006) 0.08" NA
Oct 5 12.2° 23.3° 3° (1999) 31.7° (2007) 0.08" NA
Oct 6 11.7° 23.3° 3° (1988) 32.8° (2007) 0.08" NA
Oct 7 11.7° 22.8° 3° (1988) 31.7° (2007) 0.08" NA
Oct 8 11.7° 22.8° 4° (1974) 33.3° (2007) 0.08" NA
Oct 9 11.1° 22.8° 4° (1996) 31.1° (2007) 0.08" NA
Oct 10 11.1° 22.2° 1° (1993) 29° (1969) 0.08" NA
Oct 11 10.6° 22.2° 2° (1990) 29° (1973) 0.08" NA
Oct 12 10.6° 21.7° -2° (1987) 30° (1997) 0.08" NA
Oct 13 10.6° 21.7° -1° (1987) 32° (1975) 0.08" NA
Oct 14 10° 21.7° 1.1° (2006) 32° (1975) 0.08" NA
Oct 15 10° 21.1° 3° (1977) 31° (1975) 0.08" NA
Oct 16 9.4° 21.1° 3° (1976) 31° (1989) 0.09" NA
Oct 17 9.4° 20.6° 3° (1969) 28° (1990) 0.09" NA
Oct 18 9.4° 20.6° 1° (1976) 29° (1988) 0.09" NA
Oct 19 8.9° 20° -1° (1972) 28° (1995) 0.09" NA
Oct 20 8.9° 20° -1° (1972) 28° (2003) 0.09" NA
Oct 21 8.3° 19.4° 1° (1972) 32° (2003) 0.09" NA
Oct 22 8.3° 19.4° -1° (1987) 32° (1975) 0.1" NA
Oct 23 8.3° 18.9° 1° (1969) 27° (1975) 0.1" NA
Oct 24 7.8° 18.9° -1.7° (2006) 28° (2004) 0.1" NA
Oct 25 7.8° 18.3° 2° (1968) 28° (1973) 0.1" NA
Oct 26 7.2° 18.3° 1° (1990) 28° (2004) 0.1" NA
Oct 27 7.2° 17.8° 1° (1969) 27° (1971) 0.11" NA
Oct 28 7.2° 17.8° -1° (1976) 27° (1971) 0.11" NA
Oct 29 6.7° 17.2° 1° (1968) 28° (1999) 0.11" NA
Oct 30 6.7° 17.2° -1° (1976) 29° (2004) 0.12" NA
Oct 31 6.1° 16.7° -2° (1993) 29° (1968) 0.12" NA
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