Decatur, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 12° 31° -22° (1982) 70° (1989) 1.01" NA
February 17° 37° -22° (1996) 74° (1995) 1.42" NA
March 28° 49° -10° (1998) 86° (1986) 2.67" NA
April 38° 61° 11° (1975) 91° (1989) 3.85" NA
May 51° 72° 29° (1976) 94° (1967) 4.92" NA
June 60° 82° 41° (1969) 104° (1988) 4.26" NA
July 65° 87° 46° (1971) 106° (1980) 4.93" NA
August 63° 85° 44° (1964) 105° (1988) 4.52" NA
September 53° 77° 30° (1995) 100° (2000) 4.34" NA
October 41° 64° 16° (1949) 94° (1963) 3.29" NA
November 28° 48° -11° (1964) 80° (1999) 2.64" NA
December 17° 35° -22° (1989) 68° (1984) 1.52" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Feb 1 13° 33° -15° (1979) 59° (2006) 0.04" NA
Feb 2 13° 33° -22° (1996) 66° (1992) 0.04" NA
Feb 3 14° 33° -21° (1996) 63° (1992) 0.04" NA
Feb 4 14° 33° -15° (1996) 55° (1999) 0.04" NA
Feb 5 14° 34° -15° (1979) 61° (2005) 0.04" NA
Feb 6 14° 34° -11° (1982) 60° (1999) 0.04" NA
Feb 7 15° 34° -10° (1979) 61° (1987) 0.04" NA
Feb 8 15° 34° -12° (1979) 61° (1966) 0.04" NA
Feb 9 15° 35° -18° (1979) 58° (1999) 0.04" NA
Feb 10 15° 35° -10° (1981) 59° (2000) 0.05" NA
Feb 11 16° 35° -17° (1981) 69° (1999) 0.05" NA
Feb 12 16° 36° -13° (1988) 70° (1990) 0.05" NA
Feb 13 16° 36° -3° (1986) 61° (1967) 0.05" NA
Feb 14 16° 36° 0° (2007) 68° (1967) 0.05" NA
Feb 15 17° 37° -4° (1979) 63° (1984) 0.05" NA
Feb 16 17° 37° -15° (1979) 61° (1999) 0.05" NA
Feb 17 17° 37° -5° (1979) 65° (1981) 0.05" NA
Feb 18 18° 38° -5° (1993) 64° (1995) 0.05" NA
Feb 19 18° 38° -5° (2006) 61° (1983) 0.06" NA
Feb 20 18° 38° 2° (1963) 62° (1981) 0.06" NA
Feb 21 19° 39° -3° (1963) 68° (1991) 0.06" NA
Feb 22 19° 39° -2° (1989) 67° (1982) 0.06" NA
Feb 23 20° 40° -6° (1989) 65° (2000) 0.06" NA
Feb 24 20° 40° -1° (1993) 68° (2002) 0.06" NA
Feb 25 20° 40° -4° (2003) 74° (1995) 0.06" NA
Feb 26 21° 41° -14° (1963) 67° (1988) 0.06" NA
Feb 27 21° 41° 6° (2002) 72° (1976) 0.06" NA
Feb 28 22° 42° 2° (2001) 74° (1972) 0.07" NA
Feb 29 22° 42° 3° (1996) 73° (1972) 0.07" NA
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