Henderson, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 12° 31° -31° (1974) 66° (2003) 0.9" 5.8"
February 16° 36° -29° (1996) 75° (1972) 1.12" 7.3"
March 26° 49° -24° (1960) 89° (1986) 2.24" 4.9"
April 38° 62° 0° (1975) 93° (1996) 3.79" 1.1"
May 50° 72° 21° (1961) 100° (1967) 4.83" 0"
June 60° 81° 33° (1969) 101° (1956) 5.37" 0"
July 64° 85° 36° (1971) 105° (1974) 4.58" 0"
August 62° 83° 35° (1950) 102° (2003) 3.92" 0"
September 52° 76° 23° (1983) 101° (1953) 3.34" 0.1"
October 40° 64° 12° (1997) 93° (1963) 2.51" 0.8"
November 28° 48° -17° (1964) 83° (1999) 1.63" 1.6"
December 16° 33° -30° (1983) 67° (1998) 1.18" 7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 20° 39° -2° (1960) 64° (1970) 0.05" 0.2"
Dec 2 20° 38° -4° (1985) 67° (1998) 0.05" 0.1"
Dec 3 19° 38° -1° (1985) 62° (1995) 0.04" 0.2"
Dec 4 19° 37° 2° (1978) 62° (1998) 0.05" 0.2"
Dec 5 19° 37° -2° (1964) 66° (1998) 0.04" 0.2"
Dec 6 18° 36° -10° (1950) 64° (2001) 0.04" 0.3"
Dec 7 18° 36° -13° (1976) 53° (1981) 0.05" 0.2"
Dec 8 18° 35° -16° (1976) 56° (1970) 0.04" 0.2"
Dec 9 17° 35° -9° (1956) 55° (1957) 0.04" 0.2"
Dec 10 17° 35° -15° (1948) 58° (1979) 0.04" 0.2"
Dec 11 17° 34° -10° (2009) 65° (1965) 0.05" 0.3"
Dec 12 16° 34° -15° (1962) 61° (1968) 0.04" 0.2"
Dec 13 16° 33° -22° (1961) 57° (1957) 0.04" 0.3"
Dec 14 16° 33° -14° (1972) 58° (1975) 0.04" 0.2"
Dec 15 16° 33° -18° (1951) 57° (1957) 0.04" 0.3"
Dec 16 15° 33° -25° (1951) 61° (2002) 0.03" 0.2"
Dec 17 15° 32° -11° (1951) 60° (1962) 0.04" 0.2"
Dec 18 15° 32° -18° (1983) 65° (1976) 0.03" 0.3"
Dec 19 15° 32° -25° (1983) 58° (1979) 0.04" 0.2"
Dec 20 15° 32° -17° (1983) 57° (1967) 0.03" 0.3"
Dec 21 14° 32° -22° (1989) 56° (1967) 0.04" 0.3"
Dec 22 14° 31° -26° (1989) 56° (1958) 0.03" 0.2"
Dec 23 14° 31° -26° (1989) 62° (1964) 0.04" 0.3"
Dec 24 14° 31° -30° (1983) 53° (1955) 0.04" 0.2"
Dec 25 14° 31° -18° (1983) 53° (1954) 0.03" 0.2"
Dec 26 14° 31° -19° (1962) 59° (1959) 0.03" 0.3"
Dec 27 13° 31° -15° (1951) 60° (1976) 0.03" 0.2"
Dec 28 13° 31° -6° (1961) 60° (2003) 0.03" 0.2"
Dec 29 13° 31° -12° (1983) 58° (2002) 0.03" 0.2"
Dec 30 13° 31° -17° (1976) 65° (1956) 0.03" 0.2"
Dec 31 13° 31° -18° (1976) 64° (2004) 0.03" 0.2"
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