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
Mar 1 -0.6° 9.4° -8° (1978) 27° (1972) 0.1" NA
Mar 2 -0.6° 10° -8° (1995) 26° (1976) 0.1" NA
Mar 3 10° -9° (1996) 29° (1974) 0.1" NA
Mar 4 10° -12° (1978) 26° (1992) 0.1" NA
Mar 5 0.6° 10.6° -17° (1978) 26° (1974) 0.1" NA
Mar 6 0.6° 10.6° -14° (1978) 28° (1974) 0.11" NA
Mar 7 0.6° 11.1° -11° (1996) 28° (1974) 0.11" NA
Mar 8 1.1° 11.1° -16° (1996) 26° (1974) 0.11" NA
Mar 9 1.1° 11.1° -14° (1996) 24° (1974) 0.11" NA
Mar 10 1.1° 11.7° -10° (1998) 25° (1990) 0.11" NA
Mar 11 1.7° 11.7° -9° (1969) 28° (1990) 0.12" NA
Mar 12 1.7° 11.7° -13° (1998) 28° (1972) 0.12" NA
Mar 13 1.7° 12.2° -10° (1993) 28° (1990) 0.12" NA
Mar 14 2.2° 12.2° -11° (1993) 27° (1971) 0.12" NA
Mar 15 2.2° 12.8° -8° (1993) 27° (1971) 0.12" NA
Mar 16 2.8° 12.8° -5° (1988) 24° (1995) 0.12" NA
Mar 17 2.8° 12.8° -6° (1993) 24° (1995) 0.12" NA
Mar 18 2.8° 13.3° -6° (1993) 27° (1989) 0.12" NA
Mar 19 3.3° 13.3° -3° (1989) 25° (1969) 0.13" NA
Mar 20 3.3° 13.3° -4° (1990) 24° (1976) 0.13" NA
Mar 21 3.3° 13.9° -3° (1974) 25° (1972) 0.13" NA
Mar 22 3.9° 13.9° -5° (2006) 31° (1997) 0.13" NA
Mar 23 3.9° 13.9° -4° (1971) 27° (1988) 0.13" NA
Mar 24 3.9° 14.4° -11° (1974) 28° (1994) 0.13" NA
Mar 25 4.4° 14.4° -10° (1974) 26° (2003) 0.13" NA
Mar 26 4.4° 15° -7° (1975) 28.3° (2007) 0.13" NA
Mar 27 4.4° 15° -4° (1996) 31° (1991) 0.13" NA
Mar 28 15° -1° (1970) 28° (1991) 0.13" NA
Mar 29 15.6° -4° (1969) 27° (1988) 0.13" NA
Mar 30 15.6° -4° (1969) 27° (1998) 0.13" NA
Mar 31 5.6° 16.1° -4° (1969) 26° (2005) 0.13" NA
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