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
Jul 1 63° 83° 45° (1930) 101° (1911) 0.14" NA
Jul 2 63° 83° 45° (1924) 102° (1911) 0.14" NA
Jul 3 63° 83° 46° (1924) 105° (1936) 0.14" NA
Jul 4 63° 83° 45° (1967) 111° (1936) 0.13" NA
Jul 5 63° 83° 46° (1915) 107° (1936) 0.13" NA
Jul 6 63° 84° 50° (1950) 102° (1936) 0.13" NA
Jul 7 63° 84° 44° (1906) 101° (1937) 0.13" NA
Jul 8 64° 84° 47° (1906) 101° (1930) 0.13" NA
Jul 9 64° 84° 46° (1953) 106° (1930) 0.13" NA
Jul 10 64° 84° 45° (1905) 105° (1930) 0.13" NA
Jul 11 64° 84° 46° (1905) 103° (1930) 0.13" NA
Jul 12 64° 84° 48° (1975) 105° (1936) 0.13" NA
Jul 13 64° 84° 45° (1910) 108° (1936) 0.13" NA
Jul 14 64° 84° 45° (1930) 112° (1936) 0.13" NA
Jul 15 64° 84° 44° (1930) 105° (1936) 0.13" NA
Jul 16 64° 84° 44° (1912) 107° (1936) 0.13" NA
Jul 17 64° 84° 39° (1911) 111° (1936) 0.12" NA
Jul 18 64° 84° 49° (1914) 107° (1930) 0.12" NA
Jul 19 64° 84° 47° (1947) 106° (1934) 0.12" NA
Jul 20 64° 84° 47° (1911) 105° (1934) 0.12" NA
Jul 21 64° 84° 46° (1947) 105° (1901) 0.12" NA
Jul 22 65° 84° 47° (1947) 106° (1901) 0.12" NA
Jul 23 65° 84° 49° (1948) 104° (1901) 0.12" NA
Jul 24 65° 84° 46° (1905) 106° (1901) 0.12" NA
Jul 25 65° 84° 50° (2004) 109° (1936) 0.12" NA
Jul 26 65° 84° 44° (1911) 110° (1936) 0.12" NA
Jul 27 64° 84° 49° (1962) 105° (1930) 0.12" NA
Jul 28 64° 84° 44° (1925) 106° (1935) 0.11" NA
Jul 29 64° 84° 47° (1952) 102° (1935) 0.11" NA
Jul 30 64° 84° 44° (1971) 105° (1935) 0.11" NA
Jul 31 64° 84° 48° (1960) 105° (1955) 0.11" NA
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