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
Jul 1 64° 86° 52° (1995) 97° (1970) 0.15" NA
Jul 2 64° 86° 51° (1968) 96° (1970) 0.15" NA
Jul 3 64° 86° 50° (1968) 99° (1990) 0.15" NA
Jul 4 64° 86° 50° (1967) 100° (1990) 0.16" NA
Jul 5 64° 86° 49° (1972) 98° (1978) 0.16" NA
Jul 6 64° 86° 49° (1972) 100° (1989) 0.16" NA
Jul 7 65° 87° 55° (1967) 100° (1989) 0.16" NA
Jul 8 65° 87° 57° (1994) 98° (1980) 0.16" NA
Jul 9 65° 87° 56° (1994) 99° (1980) 0.16" NA
Jul 10 65° 87° 52° (1996) 100° (1966) 0.16" NA
Jul 11 65° 87° 56° (1999) 98° (1980) 0.16" NA
Jul 12 65° 87° 52° (1975) 99° (1966) 0.16" NA
Jul 13 65° 87° 52° (1975) 102° (1988) 0.16" NA
Jul 14 65° 87° 50° (1967) 104° (1980) 0.16" NA
Jul 15 65° 87° 53° (1967) 103° (1980) 0.16" NA
Jul 16 65° 87° 57° (1976) 97° (1977) 0.16" NA
Jul 17 65° 87° 57° (1976) 101° (1980) 0.16" NA
Jul 18 65° 87° 57° (1984) 98° (1966) 0.16" NA
Jul 19 65° 87° 59° (1970) 103° (1980) 0.16" NA
Jul 20 65° 87° 52° (1970) 102° (2006) 0.16" NA
Jul 21 65° 87° 52° (1970) 100° (1983) 0.16" NA
Jul 22 66° 87° 55° (1970) 103° (1983) 0.16" NA
Jul 23 66° 87° 52° (1948) 98° (2001) 0.16" NA
Jul 24 66° 87° 55° (1948) 100° (2005) 0.16" NA
Jul 25 65° 87° 55° (2004) 99° (1997) 0.16" NA
Jul 26 65° 87° 56° (1971) 100° (1997) 0.16" NA
Jul 27 65° 87° 51° (2004) 100° (1983) 0.16" NA
Jul 28 65° 87° 54° (2005) 103° (1983) 0.16" NA
Jul 29 65° 87° 53° (1971) 97° (1970) 0.16" NA
Jul 30 65° 87° 46° (1971) 106° (1980) 0.16" NA
Jul 31 65° 87° 52° (1971) 104° (1988) 0.16" NA
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