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
Jun 1 56° 77° 39° (1956) 97° (1934) 0.16" 0"
Jun 2 56° 78° 40° (1946) 101° (1934) 0.16" 0"
Jun 3 57° 78° 31° (1969) 97° (1933) 0.16" 0"
Jun 4 57° 78° 30° (1903) 96° (1977) 0.16" 0"
Jun 5 57° 79° 39° (1935) 103° (1933) 0.17" 0"
Jun 6 58° 79° 39° (1910) 107° (1933) 0.16" 0"
Jun 7 58° 79° 36° (1901) 100° (1933) 0.16" 0"
Jun 8 58° 80° 37° (1913) 99° (1911) 0.17" 0"
Jun 9 59° 80° 35° (1915) 104° (1933) 0.16" 0"
Jun 10 59° 80° 40° (1916) 109° (1933) 0.17" 0"
Jun 11 59° 81° 37° (1903) 98° (1926) 0.16" 0"
Jun 12 60° 81° 43° (1906) 94° (1987) 0.16" 0"
Jun 13 60° 81° 39° (1969) 98° (1987) 0.16" 0"
Jun 14 60° 81° 43° (1906) 98° (1987) 0.16" 0"
Jun 15 60° 82° 41° (1927) 98° (1933) 0.16" 0"
Jun 16 61° 82° 43° (1999) 102° (1946) 0.16" 0"
Jun 17 61° 82° 41° (1903) 97° (1933) 0.16" 0"
Jun 18 61° 82° 46° (1926) 98° (1933) 0.16" 0"
Jun 19 62° 83° 42° (1926) 99° (1933) 0.16" 0"
Jun 20 62° 83° 44° (1961) 100° (1974) 0.16" 0"
Jun 21 62° 83° 40° (1902) 101° (1988) 0.17" 0"
Jun 22 62° 83° 40° (1902) 100° (1930) 0.17" 0"
Jun 23 62° 84° 46° (1955) 102° (1937) 0.16" 0"
Jun 24 63° 84° 45° (1909) 100° (1988) 0.16" 0"
Jun 25 63° 84° 43° (1958) 101° (1933) 0.18" 0"
Jun 26 63° 84° 43° (1926) 104° (1936) 0.17" 0"
Jun 27 63° 84° 45° (1905) 105° (1934) 0.17" 0"
Jun 28 64° 85° 46° (2006) 104° (1936) 0.16" 0"
Jun 29 64° 85° 42° (1923) 99° (1911) 0.15" 0"
Jun 30 64° 85° 47° (1943) 104° (1933) 0.15" 0"
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