Denison, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 30° -40° (1912) 68° (2002) 0.72" 7.5"
February 16° 35° -37° (1905) 69° (1999) 0.82" 7.4"
March 26° 47° -23° (1960) 88° (1986) 2.07" 5.9"
April 37° 61° 5° (1936) 95° (1910) 3.3" 2"
May 50° 72° 2° (1931) 105° (1934) 4.44" 0"
June 60° 82° 30° (1903) 109° (1933) 4.87" 0"
July 65° 85° 39° (1911) 112° (1936) 4.27" 0"
August 63° 83° 34° (1915) 111° (1934) 3.86" 0"
September 53° 76° 21° (1918) 103° (1939) 3.04" 0"
October 41° 63° -1° (1925) 92° (1963) 2.41" 0.4"
November 28° 47° -16° (1937) 80° (2006) 1.49" 3.3"
December 15° 33° -26° (1989) 69° (1939) 1.01" 9.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 64° 85° 45° (1930) 101° (1911) 0.15" 0"
Jul 2 64° 85° 45° (1924) 102° (1911) 0.14" 0"
Jul 3 64° 85° 46° (1924) 105° (1936) 0.15" 0"
Jul 4 64° 85° 45° (1967) 111° (1936) 0.15" 0"
Jul 5 65° 85° 46° (1915) 107° (1936) 0.15" 0"
Jul 6 65° 85° 50° (1950) 102° (1936) 0.14" 0"
Jul 7 65° 85° 44° (1906) 101° (1937) 0.15" 0"
Jul 8 65° 85° 47° (1906) 101° (1930) 0.14" 0"
Jul 9 65° 85° 46° (1953) 106° (1930) 0.15" 0"
Jul 10 65° 86° 45° (1905) 105° (1930) 0.14" 0"
Jul 11 65° 86° 46° (1905) 103° (1930) 0.15" 0"
Jul 12 65° 86° 48° (1975) 105° (1936) 0.14" 0"
Jul 13 65° 86° 45° (1910) 108° (1936) 0.15" 0"
Jul 14 65° 86° 45° (1930) 112° (1936) 0.15" 0"
Jul 15 65° 86° 44° (1930) 105° (1936) 0.14" 0"
Jul 16 65° 86° 44° (1912) 107° (1936) 0.14" 0"
Jul 17 65° 85° 39° (1911) 111° (1936) 0.14" 0"
Jul 18 65° 85° 49° (1914) 107° (1930) 0.14" 0"
Jul 19 65° 85° 47° (1947) 106° (1934) 0.14" 0"
Jul 20 65° 85° 47° (1911) 105° (1934) 0.13" 0"
Jul 21 65° 85° 46° (1947) 105° (1901) 0.13" 0"
Jul 22 65° 85° 47° (1947) 106° (1901) 0.14" 0"
Jul 23 65° 85° 49° (1948) 104° (1901) 0.14" 0"
Jul 24 65° 85° 46° (1905) 106° (1901) 0.12" 0"
Jul 25 65° 85° 50° (2004) 109° (1936) 0.13" 0"
Jul 26 65° 85° 44° (1911) 110° (1936) 0.12" 0"
Jul 27 65° 85° 49° (1962) 105° (1930) 0.12" 0"
Jul 28 65° 85° 44° (1925) 106° (1935) 0.12" 0"
Jul 29 65° 85° 47° (1952) 102° (1935) 0.12" 0"
Jul 30 65° 85° 44° (1971) 105° (1935) 0.13" 0"
Jul 31 65° 85° 48° (1960) 105° (1955) 0.12" 0"
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