Denison, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 27° -40° (1912) 68° (2002) 0.8" 6.3"
February 14° 33° -37° (1905) 69° (1999) 0.75" 7.1"
March 24° 45° -23° (1960) 88° (1986) 2.16" 7"
April 36° 59° 5° (1936) 95° (1910) 3.03" 1.7"
May 49° 70° 2° (1931) 105° (1934) 4.14" 0"
June 59° 80° 30° (1903) 109° (1933) 4.26" 0"
July 64° 84° 39° (1911) 112° (1936) 3.87" 0"
August 62° 81° 34° (1915) 111° (1934) 3.29" 0"
September 52° 74° 21° (1918) 103° (1939) 3.3" 0"
October 40° 62° -1° (1925) 92° (1963) 2.3" 0.6"
November 25° 44° -16° (1937) 80° (2006) 1.58" 3"
December 13° 31° -26° (1989) 69° (1939) 1" 7.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 30° 52° 8° (1924) 83° (1956) 0.09" NA
Apr 2 31° 53° 14° (1908) 87° (2003) 0.09" NA
Apr 3 31° 53° 5° (1936) 84° (1921) 0.09" NA
Apr 4 31° 54° 16° (1995) 88° (1929) 0.09" NA
Apr 5 32° 54° 15° (1945) 85° (1991) 0.09" NA
Apr 6 32° 55° 8° (1982) 88° (1991) 0.09" NA
Apr 7 33° 55° 14° (2007) 84° (1931) 0.09" NA
Apr 8 33° 56° 12° (1997) 89° (1931) 0.09" NA
Apr 9 33° 56° 11° (1928) 86° (1977) 0.09" NA
Apr 10 34° 57° 16° (1952) 88° (1930) 0.09" NA
Apr 11 34° 57° 16° (1940) 87° (1996) 0.1" NA
Apr 12 35° 57° 15° (1957) 86° (1916) 0.1" NA
Apr 13 35° 58° 12° (1950) 84° (1908) 0.1" NA
Apr 14 35° 58° 13° (1905) 89° (2006) 0.1" NA
Apr 15 36° 59° 18° (1926) 87° (2003) 0.1" NA
Apr 16 36° 59° 19° (1904) 90° (2002) 0.1" NA
Apr 17 37° 60° 11° (1907) 88° (2004) 0.1" NA
Apr 18 37° 60° 13° (1905) 91° (1994) 0.1" NA
Apr 19 38° 60° 20° (1928) 90° (1987) 0.1" NA
Apr 20 38° 61° 15° (1907) 87° (1961) 0.11" NA
Apr 21 38° 61° 20° (1907) 90° (1980) 0.11" NA
Apr 22 39° 62° 22° (1936) 94° (1980) 0.11" NA
Apr 23 39° 62° 21° (1956) 88° (1980) 0.11" NA
Apr 24 40° 62° 19° (1967) 90° (1906) 0.11" NA
Apr 25 40° 63° 23° (1934) 89° (1949) 0.11" NA
Apr 26 41° 63° 21° (1907) 91° (1987) 0.11" NA
Apr 27 41° 64° 25° (1909) 88° (1989) 0.11" NA
Apr 28 42° 64° 27° (1965) 95° (1910) 0.11" NA
Apr 29 42° 64° 22° (1958) 90° (1910) 0.12" NA
Apr 30 43° 65° 22° (1903) 90° (1926) 0.12" NA
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