Harlan, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 10° 30° -29° (1974) 66° (1981) 0.86" 6.8"
February 15° 35° -25° (1996) 71° (1999) 0.91" 6.6"
March 25° 48° -23° (1960) 89° (1986) 2.16" 5"
April 37° 61° 2° (1975) 93° (1989) 3.3" 1.4"
May 50° 72° 25° (1961) 100° (1967) 4.6" 0"
June 60° 81° 31° (1969) 102° (1988) 4.63" 0"
July 64° 84° 40° (1972) 106° (1955) 4.17" 0"
August 62° 82° 35° (1967) 105° (1955) 3.75" 0"
September 52° 75° 27° (1984) 106° (2000) 3.81" 0"
October 39° 63° 12° (1993) 94° (1953) 2.59" 0.8"
November 26° 47° -9° (1991) 80° (2006) 1.62" 2.8"
December 14° 32° -26° (1989) 67° (1975) 1.16" 6.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 18° 37° -3° (1985) 66° (1998) 0.04" 0.2"
Dec 2 18° 37° -3° (1985) 63° (1973) 0.04" 0.2"
Dec 3 18° 36° -5° (1985) 60° (1951) 0.05" 0.2"
Dec 4 17° 36° -1° (1991) 66° (1998) 0.04" 0.2"
Dec 5 17° 35° -4° (1964) 67° (1975) 0.04" 0.2"
Dec 6 16° 35° -10° (1972) 62° (1963) 0.04" 0.3"
Dec 7 16° 34° -12° (1976) 59° (1984) 0.04" 0.2"
Dec 8 16° 34° -15° (1976) 56° (1984) 0.04" 0.2"
Dec 9 15° 34° -10° (1958) 55° (1993) 0.05" 0.2"
Dec 10 15° 33° -11° (1995) 58° (1979) 0.04" 0.3"
Dec 11 15° 33° -10° (1994) 63° (1965) 0.04" 0.2"
Dec 12 14° 33° -15° (2000) 61° (1968) 0.04" 0.2"
Dec 13 14° 32° -15° (1961) 56° (1957) 0.04" 0.2"
Dec 14 14° 32° -14° (1985) 57° (1975) 0.04" 0.3"
Dec 15 14° 32° -15° (1989) 56° (1957) 0.03" 0.2"
Dec 16 13° 31° -17° (1951) 61° (2002) 0.04" 0.2"
Dec 17 13° 31° -11° (1964) 58° (1962) 0.03" 0.3"
Dec 18 13° 31° -17° (1983) 62° (1976) 0.04" 0.2"
Dec 19 13° 31° -25° (1983) 56° (1979) 0.04" 0.2"
Dec 20 13° 30° -18° (1983) 58° (1967) 0.03" 0.3"
Dec 21 12° 30° -22° (1989) 54° (1967) 0.04" 0.2"
Dec 22 12° 30° -25° (1989) 55° (1988) 0.04" 0.2"
Dec 23 12° 30° -26° (1989) 55° (1950) 0.03" 0.3"
Dec 24 12° 30° -20° (1983) 50° (1953) 0.04" 0.2"
Dec 25 12° 30° -16° (1983) 50° (1954) 0.03" 0.2"
Dec 26 12° 30° -15° (2000) 58° (1959) 0.03" 0.2"
Dec 27 11° 30° -13° (1951) 56° (1976) 0.04" 0.2"
Dec 28 11° 29° -5° (1961) 63° (1984) 0.03" 0.3"
Dec 29 11° 29° -10° (1990) 58° (1984) 0.03" 0.2"
Dec 30 11° 29° -12° (1961) 59° (1956) 0.03" 0.2"
Dec 31 11° 29° -19° (1968) 63° (2004) 0.03" 0.2"
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