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
Jan 1 11° 30° -12° (1968) 52° (1954) 0.02" NA
Jan 2 11° 30° -20° (1979) 56° (2004) 0.02" NA
Jan 3 11° 30° -22° (2001) 62° (2004) 0.03" NA
Jan 4 11° 30° -19° (1959) 56° (1997) 0.03" NA
Jan 5 10° 30° -28° (1999) 58° (1956) 0.03" NA
Jan 6 10° 30° -23° (1971) 54° (1961) 0.03" NA
Jan 7 10° 29° -25° (1971) 54° (1949) 0.03" NA
Jan 8 10° 29° -17° (1979) 59° (2003) 0.03" NA
Jan 9 10° 29° -16° (1977) 68° (2003) 0.03" NA
Jan 10 10° 29° -23° (1982) 58° (2002) 0.03" NA
Jan 11 10° 29° -22° (1977) 52° (1980) 0.03" NA
Jan 12 10° 29° -22° (1974) 58° (1960) 0.03" NA
Jan 13 10° 29° -13° (1963) 59° (1961) 0.03" NA
Jan 14 29° -28° (1957) 64° (1952) 0.03" NA
Jan 15 29° -26° (1979) 55° (1952) 0.03" NA
Jan 16 29° -19° (1977) 58° (1990) 0.03" NA
Jan 17 30° -20° (1997) 62° (1990) 0.03" NA
Jan 18 30° -14° (1994) 61° (1951) 0.03" NA
Jan 19 30° -19° (1970) 60° (1952) 0.03" NA
Jan 20 30° -22° (1962) 55° (2006) 0.03" NA
Jan 21 30° -24° (1963) 60° (1957) 0.03" NA
Jan 22 10° 30° -20° (1949) 62° (1964) 0.03" NA
Jan 23 10° 30° -20° (1963) 59° (2002) 0.03" NA
Jan 24 10° 30° -11° (1960) 62° (1981) 0.03" NA
Jan 25 10° 30° -12° (1963) 61° (1981) 0.03" NA
Jan 26 10° 31° -15° (1963) 57° (2002) 0.03" NA
Jan 27 10° 31° -22° (1955) 65° (2002) 0.03" NA
Jan 28 10° 31° -26° (1963) 62° (2002) 0.03" NA
Jan 29 10° 31° -22° (1966) 58° (1988) 0.03" NA
Jan 30 10° 31° -18° (1949) 59° (1988) 0.03" NA
Jan 31 11° 32° -25° (1963) 57° (1988) 0.03" NA
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