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
Aug 1 64° 84° 43° (1917) 101° (1901) 0.11" NA
Aug 2 64° 83° 45° (1907) 101° (1930) 0.11" NA
Aug 3 64° 83° 41° (1907) 111° (1930) 0.11" NA
Aug 4 64° 83° 49° (1978) 103° (1930) 0.11" NA
Aug 5 64° 83° 42° (1915) 111° (1934) 0.11" NA
Aug 6 64° 83° 50° (1902) 101° (1918) 0.11" NA
Aug 7 64° 83° 47° (1989) 98° (1937) 0.11" NA
Aug 8 64° 83° 45° (1904) 111° (1934) 0.11" NA
Aug 9 64° 83° 43° (1927) 103° (1936) 0.11" NA
Aug 10 63° 83° 46° (1910) 99° (1937) 0.11" NA
Aug 11 63° 82° 43° (1902) 103° (1935) 0.1" NA
Aug 12 63° 82° 43° (1931) 105° (1936) 0.1" NA
Aug 13 63° 82° 42° (1964) 98° (1938) 0.1" NA
Aug 14 63° 82° 47° (1962) 99° (1934) 0.1" NA
Aug 15 62° 82° 46° (1929) 102° (1936) 0.1" NA
Aug 16 62° 82° 48° (1907) 104° (1937) 0.1" NA
Aug 17 62° 82° 47° (1943) 105° (1936) 0.1" NA
Aug 18 62° 81° 45° (1943) 109° (1936) 0.1" NA
Aug 19 62° 81° 43° (1967) 98° (1983) 0.1" NA
Aug 20 61° 81° 37° (1950) 97° (1901) 0.1" NA
Aug 21 61° 81° 45° (1920) 100° (1955) 0.1" NA
Aug 22 61° 81° 41° (1923) 98° (1914) 0.1" NA
Aug 23 60° 80° 43° (1934) 99° (1938) 0.11" NA
Aug 24 60° 80° 43° (1908) 107° (1936) 0.11" NA
Aug 25 60° 80° 42° (1915) 101° (1936) 0.11" NA
Aug 26 60° 80° 42° (1904) 100° (1955) 0.11" NA
Aug 27 59° 80° 37° (1906) 102° (1955) 0.11" NA
Aug 28 59° 79° 38° (1935) 98° (1984) 0.11" NA
Aug 29 58° 79° 37° (1909) 95° (1921) 0.11" NA
Aug 30 58° 79° 34° (1915) 95° (1953) 0.11" NA
Aug 31 58° 79° 41° (1967) 99° (2000) 0.11" NA
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