Williamson, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 10° 30° -28° (1999) 68° (2003) 0.91" 6.7"
February 15° 36° -38° (1996) 73° (1972) 1.19" 6.4"
March 26° 48° -32° (1962) 87° (1986) 2.26" 4.8"
April 36° 60° 8° (1982) 90° (1970) 3.52" 2"
May 48° 71° 24° (2005) 94° (1967) 4.65" 0"
June 58° 81° 34° (1969) 102° (1988) 4.76" 0"
July 63° 86° 39° (1972) 106° (1956) 4.7" 0"
August 61° 84° 35° (1950) 104° (1954) 3.96" 0"
September 51° 76° 23° (1949) 100° (1953) 4.31" 0"
October 39° 64° 11° (1997) 95° (1963) 2.94" 0.1"
November 27° 47° -13° (1991) 80° (1950) 2.37" 1.8"
December 16° 34° -31° (1989) 69° (1984) 1.19" 4.7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Oct 1 45° 71° 24° (1974) 91° (1956) 0.12" NA
Oct 2 44° 71° 18° (1974) 94° (1953) 0.12" NA
Oct 3 44° 70° 23° (2003) 89° (1954) 0.12" NA
Oct 4 44° 70° 24° (1968) 91° (1997) 0.11" NA
Oct 5 43° 70° 26° (1979) 95° (1963) 0.11" NA
Oct 6 43° 69° 26° (1964) 93° (1963) 0.11" NA
Oct 7 42° 69° 22° (1974) 90° (1963) 0.11" NA
Oct 8 42° 68° 23° (1976) 83° (1993) 0.1" NA
Oct 9 42° 68° 21° (2000) 83° (1962) 0.1" NA
Oct 10 41° 68° 21° (2000) 90° (1963) 0.1" NA
Oct 11 41° 67° 19° (1987) 88° (1963) 0.1" NA
Oct 12 40° 67° 24° (1980) 89° (1975) 0.1" NA
Oct 13 40° 66° 23° (1979) 87° (1975) 0.1" NA
Oct 14 40° 66° 25° (1969) 86° (1953) 0.09" NA
Oct 15 39° 65° 23° (1974) 89° (1953) 0.09" NA
Oct 16 39° 65° 23° (2002) 86° (1950) 0.09" NA
Oct 17 38° 64° 16° (1976) 86° (1950) 0.09" NA
Oct 18 38° 64° 20° (1948) 87° (1950) 0.09" NA
Oct 19 38° 63° 14° (1972) 85° (1953) 0.09" NA
Oct 20 37° 63° 18° (1960) 85° (1953) 0.09" NA
Oct 21 37° 62° 24° (1989) 85° (2003) 0.09" NA
Oct 22 36° 62° 15° (1976) 82° (1963) 0.09" NA
Oct 23 36° 61° 18° (1981) 84° (1963) 0.09" NA
Oct 24 36° 61° 19° (1981) 80° (1952) 0.08" NA
Oct 25 35° 60° 19° (1968) 80° (1952) 0.08" NA
Oct 26 35° 59° 20° (1949) 84° (1955) 0.08" NA
Oct 27 34° 59° 11° (1997) 83° (1950) 0.08" NA
Oct 28 34° 58° 13° (1997) 82° (1999) 0.08" NA
Oct 29 34° 57° 11° (1980) 82° (1950) 0.08" NA
Oct 30 33° 57° 13° (1988) 86° (1950) 0.08" NA
Oct 31 33° 56° 18° (1949) 87° (1950) 0.08" NA
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