Williamson, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 32° -28° (1999) 68° (2003) 0.86" 6.1"
February 15° 37° -38° (1996) 73° (1972) 1.33" 6.3"
March 25° 49° -32° (1962) 87° (1986) 2.23" 4.1"
April 36° 62° 8° (1982) 90° (1970) 3.76" 0.7"
May 47° 71° 24° (2005) 94° (1967) 5.05" 0"
June 58° 81° 34° (1969) 102° (1988) 5.01" 0"
July 63° 85° 39° (1972) 106° (1956) 4.81" 0"
August 60° 84° 35° (1950) 104° (1954) 4.41" 0"
September 50° 76° 23° (1949) 100° (1953) 3.83" 0"
October 38° 64° 11° (1997) 95° (1963) 2.89" 0.2"
November 27° 49° -13° (1991) 80° (1950) 2.21" 1.4"
December 15° 35° -31° (1989) 69° (1984) 1.18" 4.4"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 31° 56° 19° (1996) 82° (1956) 0.09" 0.1"
Apr 2 31° 56° 14° (1970) 86° (1981) 0.09" 0"
Apr 3 32° 57° 8° (1975) 84° (1981) 0.1" 0.1"
Apr 4 32° 57° 12° (2002) 80° (1988) 0.09" 0"
Apr 5 32° 58° 15° (1971) 80° (2005) 0.1" 0"
Apr 6 33° 58° 8° (1982) 90° (1954) 0.1" 0.1"
Apr 7 33° 58° 12° (1990) 83° (1954) 0.11" 0"
Apr 8 33° 59° 12° (1990) 79° (1952) 0.11" 0.1"
Apr 9 34° 59° 16° (1996) 83° (1977) 0.11" 0"
Apr 10 34° 60° 16° (2003) 83° (1981) 0.12" 0"
Apr 11 34° 60° 18° (1973) 84° (1968) 0.11" 0.1"
Apr 12 35° 60° 16° (1980) 83° (1971) 0.12" 0"
Apr 13 35° 61° 17° (1957) 78° (1977) 0.12" 0"
Apr 14 35° 61° 16° (1950) 88° (2006) 0.12" 0"
Apr 15 36° 62° 19° (1950) 86° (2006) 0.13" 0"
Apr 16 36° 62° 20° (1962) 86° (1964) 0.12" 0.1"
Apr 17 37° 62° 22° (1951) 86° (1964) 0.13" 0"
Apr 18 37° 63° 20° (1983) 86° (1955) 0.13" 0"
Apr 19 37° 63° 17° (1988) 85° (1985) 0.13" 0"
Apr 20 38° 63° 22° (1956) 88° (1987) 0.13" 0"
Apr 21 38° 64° 23° (1966) 89° (1980) 0.14" 0"
Apr 22 38° 64° 22° (1986) 89° (1980) 0.14" 0.1"
Apr 23 39° 64° 18° (1956) 87° (1980) 0.14" 0"
Apr 24 39° 65° 19° (1967) 86° (1954) 0.15" 0"
Apr 25 39° 65° 25° (2005) 89° (1989) 0.15" 0"
Apr 26 40° 65° 23° (1964) 89° (1987) 0.16" 0"
Apr 27 40° 66° 26° (1950) 89° (1956) 0.15" 0"
Apr 28 41° 66° 26° (2002) 90° (1970) 0.16" 0"
Apr 29 41° 66° 20° (1958) 89° (1970) 0.15" 0"
Apr 30 41° 67° 26° (2005) 88° (1965) 0.16" 0"
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