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
Mar 1 21° 40° -18° (1962) 74° (1992) 0.05" 0.2"
Mar 2 21° 41° -15° (1913) 70° (1923) 0.05" 0.3"
Mar 3 21° 41° -4° (2002) 78° (1905) 0.05" 0.2"
Mar 4 22° 42° -13° (1960) 72° (1921) 0.05" 0.2"
Mar 5 22° 42° -23° (1960) 70° (1910) 0.05" 0.2"
Mar 6 22° 42° -8° (1962) 74° (1987) 0.05" 0.2"
Mar 7 23° 43° -9° (1996) 75° (1987) 0.06" 0.2"
Mar 8 23° 43° -8° (1995) 75° (2000) 0.05" 0.3"
Mar 9 23° 44° -5° (1984) 76° (1986) 0.06" 0.2"
Mar 10 24° 44° -8° (1948) 74° (1900) 0.05" 0.1"
Mar 11 24° 45° -21° (1948) 80° (1900) 0.06" 0.2"
Mar 12 25° 45° -9° (1998) 78° (1900) 0.06" 0.2"
Mar 13 25° 46° -6° (1998) 71° (1996) 0.06" 0.2"
Mar 14 25° 46° -6° (1960) 78° (2007) 0.07" 0.2"
Mar 15 26° 47° -2° (1912) 77° (1935) 0.07" 0.2"
Mar 16 26° 47° -9° (1900) 76° (1930) 0.07" 0.2"
Mar 17 26° 48° -6° (1909) 74° (2003) 0.07" 0.2"
Mar 18 27° 48° -10° (1923) 84° (1918) 0.07" 0.2"
Mar 19 27° 49° -12° (1923) 85° (1918) 0.07" 0.2"
Mar 20 27° 49° 2° (1906) 80° (1921) 0.07" 0.2"
Mar 21 28° 50° -1° (1951) 85° (1907) 0.08" 0.1"
Mar 22 28° 50° -9° (1912) 81° (1910) 0.07" 0.2"
Mar 23 28° 51° 3° (1965) 86° (1910) 0.07" 0.2"
Mar 24 29° 51° 0° (1974) 83° (1967) 0.08" 0.1"
Mar 25 29° 52° 3° (1955) 81° (1908) 0.08" 0.2"
Mar 26 29° 52° 1° (1964) 87° (1907) 0.08" 0.2"
Mar 27 30° 53° 6° (1955) 81° (1905) 0.08" 0.1"
Mar 28 30° 53° 6° (1970) 84° (1986) 0.08" 0.2"
Mar 29 30° 54° 1° (1969) 88° (1986) 0.09" 0.2"
Mar 30 31° 54° 5° (1969) 85° (1968) 0.08" 0.2"
Mar 31 31° 55° 9° (1924) 84° (1986) 0.09" 0.1"
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