Sterling/Rock Falls, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -12° -3° -32.8° (1999) 18.3° (2004) 1.6" 9"
February -9° -32.8° (1905) 21.7° (2000) 1.43" 6.8"
March -3° -25° (2002) 30.6° (1986) 2.55" 5"
April 14° -13.3° (1982) 33.9° (1986) 3.61" 1.3"
May 21° -4.4° (2005) 40.6° (1934) 4.32" 0"
June 14° 26° 1.1° (1945) 41.1° (1934) 4.88" 0"
July 17° 28° 6.1° (1904) 43.3° (1936) 3.45" 0"
August 16° 27° 2.8° (1934) 39.4° (1988) 4.47" 0"
September 11° 23° -5.6° (1942) 38.9° (1939) 3.31" 0"
October 17° -13.9° (1925) 33.9° (1963) 2.71" 0.2"
November -2° -22.2° (1977) 27.2° (1933) 2.82" 1.5"
December -8° -1° -31.7° (1983) 20° (1998) 2.13" 9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Oct 1 7.2° 20° -2° (1939) 32° (1971) 0.09" NA
Oct 2 7.2° 20° -4° (2003) 32° (1971) 0.09" NA
Oct 3 6.7° 20° -4° (2003) 31° (1922) 0.09" NA
Oct 4 6.7° 19.4° -4° (1935) 33° (1997) 0.09" NA
Oct 5 6.7° 19.4° -4° (1980) 32° (1922) 0.09" NA
Oct 6 6.1° 18.9° -7° (1952) 34° (1963) 0.09" NA
Oct 7 6.1° 18.9° -3° (2000) 31° (1939) 0.09" NA
Oct 8 5.6° 18.9° -4° (1952) 31° (1949) 0.09" NA
Oct 9 5.6° 18.3° -4° (1915) 29° (1916) 0.09" NA
Oct 10 5.6° 18.3° -5° (1925) 32° (1938) 0.09" NA
Oct 11 17.8° -4° (1906) 31° (1920) 0.09" NA
Oct 12 17.8° -4° (1987) 29° (1920) 0.08" NA
Oct 13 4.4° 17.2° -5° (1909) 31° (1975) 0.08" NA
Oct 14 4.4° 17.2° -7° (1937) 30° (1947) 0.08" NA
Oct 15 4.4° 17.2° -8° (1937) 31° (1947) 0.08" NA
Oct 16 3.9° 16.7° -4° (1944) 31° (1938) 0.08" NA
Oct 17 3.9° 16.7° -3° (1939) 31° (1910) 0.08" NA
Oct 18 3.9° 16.1° -7° (1948) 31° (1924) 0.08" NA
Oct 19 3.3° 16.1° -7° (1972) 29° (1953) 0.08" NA
Oct 20 3.3° 15.6° -7° (1992) 29° (1953) 0.09" NA
Oct 21 2.8° 15.6° -6° (1952) 31° (1947) 0.09" NA
Oct 22 2.8° 15° -6° (1925) 29° (1947) 0.09" NA
Oct 23 2.8° 15° -6° (1913) 31° (1902) 0.09" NA
Oct 24 2.2° 14.4° -8° (1981) 28° (1902) 0.09" NA
Oct 25 2.2° 14.4° -6° (1981) 26° (1927) 0.09" NA
Oct 26 2.2° 13.9° -8° (1962) 28° (1939) 0.09" NA
Oct 27 1.7° 13.3° -8° (1942) 29° (1927) 0.09" NA
Oct 28 1.7° 13.3° -14° (1925) 27° (1927) 0.09" NA
Oct 29 1.7° 12.8° -13° (1925) 28° (1937) 0.09" NA
Oct 30 1.1° 12.8° -13° (1925) 28° (1950) 0.09" NA
Oct 31 1.1° 12.2° -11° (1925) 28° (1950) 0.09" NA
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