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
Mar 1 23° 43° 0° (1980) 76° (1992) 0.07" 0.1"
Mar 2 24° 43° -2° (1980) 77° (1992) 0.07" 0.2"
Mar 3 24° 44° -2° (2002) 80° (1983) 0.07" 0.2"
Mar 4 24° 44° -5° (2002) 67° (1987) 0.08" 0.1"
Mar 5 25° 44° 4° (1980) 68° (1987) 0.07" 0.2"
Mar 6 25° 45° 6° (1982) 75° (2009) 0.08" 0.2"
Mar 7 26° 45° -4° (1996) 74° (2000) 0.07" 0.1"
Mar 8 26° 46° -4° (1995) 80° (2000) 0.08" 0.2"
Mar 9 26° 46° 4° (1995) 72° (1986) 0.07" 0.2"
Mar 10 27° 47° 2° (1998) 74° (1967) 0.08" 0.1"
Mar 11 27° 47° 1° (1998) 80° (1972) 0.08" 0.2"
Mar 12 27° 48° -10° (1998) 77° (1990) 0.07" 0.1"
Mar 13 28° 48° -8° (1998) 71° (2007) 0.08" 0.2"
Mar 14 28° 49° 9° (1975) 76° (2007) 0.09" 0.1"
Mar 15 29° 49° 3° (1949) 75° (2002) 0.08" 0.1"
Mar 16 29° 49° 16° (1970) 78° (2003) 0.08" 0.2"
Mar 17 29° 50° 9° (1993) 79° (2003) 0.09" 0.1"
Mar 18 30° 50° 7° (1965) 76° (2003) 0.08" 0.1"
Mar 19 30° 51° 7° (1965) 75° (1976) 0.09" 0.2"
Mar 20 30° 51° 13° (1965) 72° (1994) 0.08" 0.1"
Mar 21 31° 52° 8° (1965) 74° (1991) 0.09" 0.1"
Mar 22 31° 52° 10° (2002) 83° (1988) 0.09" 0.1"
Mar 23 31° 53° 8° (1965) 80° (1994) 0.08" 0.1"
Mar 24 32° 53° 4° (1965) 82° (1967) 0.09" 0.1"
Mar 25 32° 54° 7° (1965) 80° (1991) 0.09" 0"
Mar 26 32° 54° 5° (1964) 85° (1991) 0.09" 0.1"
Mar 27 33° 54° 16° (2001) 80° (1989) 0.1" 0.1"
Mar 28 33° 55° 6° (1970) 81° (1968) 0.1" 0.1"
Mar 29 33° 55° 9° (1969) 86° (1986) 0.1" 0.1"
Mar 30 34° 56° 11° (1964) 82° (1968) 0.1" 0.1"
Mar 31 34° 56° 20° (1987) 80° (1966) 0.11" 0.1"
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