Sterling, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 12° 29° -27° (1999) 65° (2004) 1.57" 11.2"
February 16° 34° -27° (1905) 71° (2000) 1.65" 5.8"
March 27° 46° -13° (2002) 87° (1986) 2.47" 4.1"
April 38° 60° 8° (1982) 93° (1986) 3.5" 0.7"
May 49° 71° 24° (2005) 105° (1934) 4.41" 0"
June 59° 79° 34° (1945) 106° (1934) 4.9" 0"
July 63° 83° 43° (1904) 110° (1936) 4.14" 0"
August 61° 81° 37° (1934) 103° (1988) 4.5" 0"
September 51° 75° 22° (1942) 102° (1939) 3.55" 0"
October 40° 62° 7° (1925) 93° (1963) 2.9" 0.1"
November 29° 47° -8° (1977) 81° (1933) 2.69" 1.4"
December 17° 33° -25° (1983) 68° (1998) 2.19" 6.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 22° 38° -1° (1976) 64° (1962) 0.09" 0.2"
Dec 2 21° 38° -3° (1942) 64° (1951) 0.08" 0.1"
Dec 3 21° 37° -9° (1940) 68° (1970) 0.09" 0.2"
Dec 4 20° 37° -6° (1991) 67° (1998) 0.08" 0.2"
Dec 5 20° 36° -6° (1991) 68° (1998) 0.09" 0.2"
Dec 6 20° 36° -8° (1977) 66° (2001) 0.08" 0.1"
Dec 7 19° 35° -8° (2005) 60° (1980) 0.09" 0.2"
Dec 8 19° 35° -9° (1902) 65° (1916) 0.08" 0.2"
Dec 9 18° 35° -16° (1958) 62° (1946) 0.08" 0.2"
Dec 10 18° 34° -19° (1919) 57° (1946) 0.08" 0.2"
Dec 11 18° 34° -13° (1972) 62° (1949) 0.09" 0.2"
Dec 12 17° 33° -9° (1962) 58° (1949) 0.07" 0.2"
Dec 13 17° 33° -14° (1903) 60° (1991) 0.08" 0.3"
Dec 14 17° 33° -12° (1901) 58° (1975) 0.07" 0.2"
Dec 15 16° 32° -19° (1917) 60° (1971) 0.07" 0.2"
Dec 16 16° 32° -16° (1951) 56° (1939) 0.07" 0.2"
Dec 17 16° 32° -12° (1945) 59° (1984) 0.07" 0.2"
Dec 18 16° 32° -13° (1985) 63° (1939) 0.06" 0.2"
Dec 19 15° 31° -18° (1983) 55° (1918) 0.06" 0.3"
Dec 20 15° 31° -18° (1983) 56° (1949) 0.07" 0.2"
Dec 21 15° 31° -18° (1963) 54° (1941) 0.06" 0.2"
Dec 22 15° 31° -21° (1989) 57° (1957) 0.07" 0.3"
Dec 23 14° 30° -23° (1989) 57° (1941) 0.06" 0.2"
Dec 24 14° 30° -25° (1983) 58° (1979) 0.06" 0.3"
Dec 25 14° 30° -24° (1983) 59° (1982) 0.06" 0.2"
Dec 26 14° 30° -23° (1914) 58° (1982) 0.06" 0.3"
Dec 27 14° 30° -21° (1950) 56° (1959) 0.06" 0.3"
Dec 28 13° 30° -25° (1924) 59° (1982) 0.05" 0.2"
Dec 29 13° 29° -11° (1917) 65° (1984) 0.06" 0.3"
Dec 30 13° 29° -10° (1917) 59° (1936) 0.05" 0.3"
Dec 31 13° 29° -15° (1914) 59° (2002) 0.05" 0.3"
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