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
Mar 1 22° 42° 0° (1980) 76° (1992) 0.07" NA
Mar 2 22° 43° -2° (1980) 77° (1992) 0.07" NA
Mar 3 23° 43° -2° (2002) 80° (1983) 0.07" NA
Mar 4 23° 44° -5° (2002) 67° (1987) 0.07" NA
Mar 5 24° 44° 4° (1980) 68° (1987) 0.07" NA
Mar 6 24° 45° 6° (1982) 69° (1950) 0.07" NA
Mar 7 24° 45° -4° (1996) 74° (2000) 0.07" NA
Mar 8 25° 46° -4° (1995) 80° (2000) 0.08" NA
Mar 9 25° 46° 4° (1995) 72° (1986) 0.08" NA
Mar 10 25° 46° 2° (1998) 74° (1967) 0.08" NA
Mar 11 26° 47° 1° (1998) 80° (1972) 0.08" NA
Mar 12 26° 47° -10° (1998) 77° (1990) 0.08" NA
Mar 13 27° 48° -8° (1998) 71° (2007) 0.08" NA
Mar 14 27° 48° 9° (1975) 76° (2007) 0.08" NA
Mar 15 27° 49° 3° (1949) 75° (2002) 0.08" NA
Mar 16 28° 49° 16° (1970) 78° (2003) 0.09" NA
Mar 17 28° 50° 9° (1993) 79° (2003) 0.09" NA
Mar 18 28° 50° 7° (1965) 76° (2003) 0.09" NA
Mar 19 29° 50° 7° (1965) 75° (1976) 0.09" NA
Mar 20 29° 51° 13° (1965) 72° (1994) 0.09" NA
Mar 21 29° 51° 8° (1965) 74° (1991) 0.09" NA
Mar 22 30° 52° 10° (2002) 83° (1988) 0.09" NA
Mar 23 30° 52° 8° (1965) 80° (1994) 0.1" NA
Mar 24 31° 52° 4° (1965) 82° (1967) 0.1" NA
Mar 25 31° 53° 7° (1965) 80° (1991) 0.1" NA
Mar 26 31° 53° 5° (1964) 85° (1991) 0.1" NA
Mar 27 32° 54° 16° (2001) 80° (1989) 0.1" NA
Mar 28 32° 54° 6° (1970) 81° (1968) 0.1" NA
Mar 29 32° 55° 9° (1969) 86° (1986) 0.1" NA
Mar 30 33° 55° 11° (1964) 82° (1968) 0.1" NA
Mar 31 33° 55° 20° (1987) 80° (1966) 0.11" NA
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