Duncan, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 22° -31° (1970) 62° (2002) 0.93" NA
February 10° 28° -30° (1996) 63° (1981) 0.91" NA
March 23° 41° -25° (1962) 83° (1968) 1.94" NA
April 35° 56° 5° (1975) 94° (1980) 3.18" NA
May 48° 70° 22° (1967) 99° (1967) 3.76" NA
June 58° 80° 35° (1978) 104° (1985) 4.71" NA
July 61° 82° 41° (1950) 106° (1948) 4.27" NA
August 59° 79° 30° (1950) 101° (1988) 3.87" NA
September 49° 72° 22° (1984) 100° (1960) 2.98" NA
October 37° 59° 11° (1949) 93° (1997) 2.1" NA
November 24° 40° -16° (1977) 79° (2006) 1.85" NA
December 26° -27° (1990) 67° (1998) 1.04" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 22° -25° (1974) 48° (1964) 0.03" NA
Jan 2 22° -13° (1988) 47° (1964) 0.03" NA
Jan 3 22° -18° (1968) 47° (1998) 0.03" NA
Jan 4 22° -20° (1969) 48° (1964) 0.03" NA
Jan 5 21° -22° (1988) 47° (1956) 0.03" NA
Jan 6 21° -29° (1988) 40° (1961) 0.03" NA
Jan 7 21° -20° (1986) 44° (1963) 0.03" NA
Jan 8 21° -21° (1970) 56° (2003) 0.03" NA
Jan 9 21° -26° (1977) 56° (2003) 0.03" NA
Jan 10 21° -25° (1982) 47° (2002) 0.03" NA
Jan 11 21° -18° (1974) 47° (1990) 0.03" NA
Jan 12 21° -23° (1974) 48° (1987) 0.03" NA
Jan 13 21° -17° (1963) 50° (1987) 0.03" NA
Jan 14 21° -23° (1982) 51° (1987) 0.03" NA
Jan 15 21° -26° (1972) 48° (1990) 0.03" NA
Jan 16 21° -25° (1977) 55° (1990) 0.03" NA
Jan 17 21° -20° (1954) 44° (1951) 0.03" NA
Jan 18 21° -27° (1967) 49° (1996) 0.03" NA
Jan 19 21° -29° (1970) 50° (1981) 0.03" NA
Jan 20 21° -25° (1962) 47° (1968) 0.03" NA
Jan 21 22° -31° (1970) 45° (1968) 0.03" NA
Jan 22 22° -18° (1963) 49° (1981) 0.03" NA
Jan 23 22° -25° (1963) 54° (1981) 0.03" NA
Jan 24 22° -19° (1961) 62° (1981) 0.03" NA
Jan 25 22° -14° (1961) 58° (1981) 0.03" NA
Jan 26 22° -24° (1982) 54° (2002) 0.03" NA
Jan 27 22° -22° (1950) 62° (2002) 0.03" NA
Jan 28 23° -21° (1966) 53° (2002) 0.03" NA
Jan 29 23° -29° (1966) 44° (1976) 0.03" NA
Jan 30 23° -23° (1965) 50° (1964) 0.03" NA
Jan 31 23° -24° (1994) 47° (1964) 0.03" NA
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