Affton, Missouri
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
Dec 1 32° 47° 19° (2002) 77° (1970) 0.12" NA
Dec 2 31° 47° 19° (2006) 72° (1970) 0.11" NA
Dec 3 31° 46° 11° (1974) 78° (1970) 0.11" NA
Dec 4 31° 46° 11° (1974) 75° (1970) 0.11" NA
Dec 5 30° 46° 14° (1974) 67° (1975) 0.1" NA
Dec 6 30° 45° 0° (1977) 71° (1998) 0.1" NA
Dec 7 30° 45° 6° (1977) 71° (1998) 0.1" NA
Dec 8 29° 45° 6° (1977) 59° (1970) 0.09" NA
Dec 9 29° 44° 2° (1995) 63° (1970) 0.09" NA
Dec 10 29° 44° 2° (1977) 65° (1971) 0.09" NA
Dec 11 28° 44° 9° (1972) 65° (1996) 0.09" NA
Dec 12 28° 43° 7° (1989) 65° (1990) 0.09" NA
Dec 13 28° 43° 10° (1989) 66° (1969) 0.08" NA
Dec 14 27° 43° 7° (1989) 67° (1975) 0.08" NA
Dec 15 27° 42° -5° (1989) 68° (1975) 0.08" NA
Dec 16 27° 42° -8° (1989) 65° (1971) 0.08" NA
Dec 17 26° 42° -3° (1989) 66° (2006) 0.08" NA
Dec 18 26° 41° 6° (1989) 62° (2002) 0.07" NA
Dec 19 26° 41° 7° (1996) 64° (1976) 0.07" NA
Dec 20 26° 41° 7° (1996) 66° (1976) 0.07" NA
Dec 21 25° 40° -6° (1989) 67° (1988) 0.07" NA
Dec 22 25° 40° -15° (1989) 62° (2006) 0.07" NA
Dec 23 25° 40° -17° (1989) 59° (1988) 0.07" NA
Dec 24 24° 40° -10° (1989) 64° (1996) 0.07" NA
Dec 25 24° 39° 2° (1990) 59° (1971) 0.07" NA
Dec 26 24° 39° 6° (1990) 61° (1971) 0.07" NA
Dec 27 24° 39° 6° (1977) 70° (1971) 0.07" NA
Dec 28 23° 39° 10° (1977) 64° (1976) 0.07" NA
Dec 29 23° 39° 8° (1976) 60° (2006) 0.07" NA
Dec 30 23° 38° 7° (1990) 62° (2004) 0.06" NA
Dec 31 23° 38° 3° (1968) 69° (2002) 0.06" NA
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