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
Jun 1 56° 78° 42° (2001) 91° (2000) 0.15" NA
Jun 2 57° 78° 43° (1969) 92° (2002) 0.15" NA
Jun 3 57° 78° 41° (1969) 94° (1972) 0.15" NA
Jun 4 57° 79° 44° (1998) 91° (1948) 0.14" NA
Jun 5 58° 79° 46° (1993) 101° (1977) 0.14" NA
Jun 6 58° 79° 46° (1983) 98° (1977) 0.14" NA
Jun 7 58° 80° 51° (1998) 94° (1963) 0.14" NA
Jun 8 58° 80° 46° (1978) 97° (1985) 0.14" NA
Jun 9 59° 80° 47° (1989) 94° (1972) 0.14" NA
Jun 10 59° 80° 44° (1966) 96° (1977) 0.14" NA
Jun 11 59° 81° 50° (1972) 92° (1977) 0.14" NA
Jun 12 60° 81° 50° (1969) 92° (1972) 0.14" NA
Jun 13 60° 81° 45° (1985) 95° (1963) 0.14" NA
Jun 14 60° 82° 49° (1989) 96° (1987) 0.14" NA
Jun 15 60° 82° 49° (1989) 96° (1987) 0.14" NA
Jun 16 61° 82° 47° (1989) 96° (1978) 0.14" NA
Jun 17 61° 82° 48° (1999) 92° (1978) 0.14" NA
Jun 18 61° 83° 49° (2000) 94° (1971) 0.14" NA
Jun 19 61° 83° 52° (1985) 98° (1988) 0.14" NA
Jun 20 61° 83° 50° (1980) 101° (1988) 0.14" NA
Jun 21 62° 83° 47° (1992) 102° (1988) 0.14" NA
Jun 22 62° 84° 51° (1972) 98° (1988) 0.14" NA
Jun 23 62° 84° 53° (2001) 100° (1988) 0.14" NA
Jun 24 62° 84° 55° (1967) 103° (1988) 0.14" NA
Jun 25 62° 84° 49° (2004) 104° (1988) 0.14" NA
Jun 26 63° 84° 49° (1968) 97° (1971) 0.14" NA
Jun 27 63° 85° 46° (1968) 99° (1980) 0.14" NA
Jun 28 63° 85° 53° (1968) 100° (1988) 0.15" NA
Jun 29 63° 85° 54° (1999) 97° (1991) 0.15" NA
Jun 30 63° 85° 55° (1948) 97° (1963) 0.15" NA
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