Decatur, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 14° 32° -22° (1982) 70° (1989) 0.97" 5.8"
February 18° 38° -22° (1996) 74° (1995) 1.54" 5.6"
March 29° 49° -10° (1998) 86° (1986) 2.6" 4"
April 40° 62° 11° (1975) 91° (1989) 3.96" 0.9"
May 52° 72° 29° (1976) 94° (1967) 5.69" 0"
June 62° 82° 41° (1969) 104° (1988) 5.21" 0"
July 66° 86° 46° (1971) 106° (1980) 5.1" 0"
August 64° 85° 44° (1964) 105° (1988) 4.52" 0"
September 54° 77° 30° (1995) 100° (2000) 4.19" 0"
October 42° 64° 16° (1949) 94° (1963) 3.34" 0.2"
November 30° 49° -11° (1964) 80° (1999) 2.4" 1.5"
December 18° 35° -22° (1989) 68° (1984) 1.58" 5.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 34° 57° 23° (1948) 80° (1963) 0.11" 0.1"
Apr 2 35° 57° 15° (1970) 85° (1981) 0.11" 0"
Apr 3 35° 57° 11° (1975) 81° (2003) 0.11" 0.1"
Apr 4 35° 58° 21° (1972) 79° (1988) 0.11" 0"
Apr 5 36° 58° 17° (1982) 81° (1991) 0.11" 0.1"
Apr 6 36° 59° 12° (1982) 87° (2000) 0.11" 0"
Apr 7 36° 59° 16° (2007) 84° (2010) 0.12" 0.1"
Apr 8 37° 59° 16° (2007) 78° (1988) 0.12" 0"
Apr 9 37° 60° 19° (2007) 83° (2001) 0.11" 0.1"
Apr 10 38° 60° 20° (1989) 83° (1981) 0.11" 0"
Apr 11 38° 61° 26° (1973) 83° (1968) 0.12" 0"
Apr 12 38° 61° 23° (1997) 83° (1971) 0.12" 0.1"
Apr 13 39° 61° 23° (1997) 77° (1988) 0.13" 0"
Apr 14 39° 62° 28° (1997) 89° (2006) 0.13" 0"
Apr 15 40° 62° 28° (1983) 87° (2002) 0.14" 0.1"
Apr 16 40° 62° 23° (1949) 85° (1964) 0.13" 0"
Apr 17 40° 63° 26° (1983) 86° (2004) 0.14" 0"
Apr 18 41° 63° 24° (1983) 85° (1948) 0.13" 0"
Apr 19 41° 63° 26° (1949) 85° (1987) 0.14" 0.1"
Apr 20 42° 64° 30° (1966) 89° (1987) 0.14" 0"
Apr 21 42° 64° 25° (1966) 87° (1980) 0.14" 0"
Apr 22 42° 64° 28° (1986) 88° (1980) 0.14" 0"
Apr 23 43° 65° 27° (1967) 84° (1990) 0.16" 0.1"
Apr 24 43° 65° 27° (1967) 89° (1989) 0.15" 0"
Apr 25 44° 65° 30° (1968) 91° (1989) 0.15" 0"
Apr 26 44° 66° 32° (1992) 91° (1989) 0.15" 0"
Apr 27 45° 66° 33° (1995) 91° (1989) 0.16" 0"
Apr 28 45° 66° 31° (1966) 89° (1970) 0.15" 0"
Apr 29 45° 67° 31° (1994) 88° (1987) 0.16" 0"
Apr 30 46° 67° 32° (1990) 87° (1965) 0.16" 0"
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