Heman, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 19° 36° -23° (1977) 73° (1909) 2.14" 4.8"
February 23° 41° -25° (1905) 76° (1972) 2.07" 4.2"
March 32° 53° -10° (1978) 89° (1929) 2.59" 1.7"
April 43° 66° 15° (1982) 93° (1987) 3.67" 0.2"
May 53° 76° 26° (1903) 101° (1934) 4.79" 0"
June 62° 85° 38° (1917) 105° (1954) 4.5" 0"
July 66° 88° 45° (1930) 113° (1954) 3.98" 0"
August 64° 86° 35° (1986) 106° (1983) 3.77" 0"
September 56° 80° 27° (1928) 104° (1954) 3.14" 0"
October 45° 68° 12° (1925) 96° (1953) 3.25" 0"
November 34° 53° -3° (1929) 83° (1933) 3.71" 0.2"
December 23° 39° -22° (1983) 72° (1970) 2.78" 4.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 28° 45° 7° (1964) 72° (1970) 0.1" 0.1"
Dec 2 27° 44° 1° (1929) 70° (1982) 0.09" 0.1"
Dec 3 27° 44° -7° (1929) 72° (1970) 0.1" 0.1"
Dec 4 27° 43° 1° (1991) 71° (1998) 0.1" 0.1"
Dec 5 26° 43° 9° (1937) 70° (1956) 0.09" 0.1"
Dec 6 26° 42° -2° (1977) 70° (1980) 0.1" 0.1"
Dec 7 25° 42° -2° (1976) 67° (1946) 0.09" 0.1"
Dec 8 25° 42° -4° (1909) 68° (1916) 0.1" 0.1"
Dec 9 25° 41° -8° (1917) 70° (1918) 0.09" 0.1"
Dec 10 24° 41° -10° (1917) 66° (1918) 0.1" 0.2"
Dec 11 24° 40° -12° (1917) 65° (1949) 0.1" 0.1"
Dec 12 24° 40° -10° (1962) 65° (1929) 0.09" 0.2"
Dec 13 24° 40° -8° (1903) 66° (1975) 0.08" 0.1"
Dec 14 23° 39° -7° (1901) 65° (1975) 0.09" 0.2"
Dec 15 23° 39° -13° (1901) 67° (1948) 0.09" 0.1"
Dec 16 23° 39° -10° (1989) 66° (1984) 0.08" 0.2"
Dec 17 23° 39° -5° (1989) 62° (1984) 0.09" 0.2"
Dec 18 22° 38° -6° (1981) 65° (1908) 0.08" 0.2"
Dec 19 22° 38° -15° (1901) 61° (1957) 0.08" 0.2"
Dec 20 22° 38° -15° (1981) 64° (1988) 0.08" 0.2"
Dec 21 22° 38° -16° (1989) 64° (1941) 0.09" 0.2"
Dec 22 21° 37° -21° (1989) 61° (1933) 0.09" 0.1"
Dec 23 21° 37° -20° (1989) 66° (1933) 0.08" 0.2"
Dec 24 21° 37° -22° (1983) 62° (1940) 0.09" 0.2"
Dec 25 21° 37° -17° (1983) 63° (1982) 0.08" 0.2"
Dec 26 21° 37° -15° (1914) 65° (1942) 0.09" 0.3"
Dec 27 21° 37° -7° (1935) 64° (2008) 0.09" 0.2"
Dec 28 20° 37° -19° (1924) 71° (1984) 0.08" 0.2"
Dec 29 20° 36° -7° (1917) 65° (1984) 0.09" 0.2"
Dec 30 20° 36° -14° (1983) 64° (1965) 0.09" 0.1"
Dec 31 20° 36° -15° (1909) 63° (1951) 0.09" 0.2"
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