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
Nov 1 1.1° 12.2° -7° (1930) 27° (1933) 0.09" NA
Nov 2 0.6° 11.7° -9° (1951) 26° (1938) 0.09" NA
Nov 3 0.6° 11.1° -13° (1951) 25° (1938) 0.09" NA
Nov 4 0.6° 11.1° -12° (1951) 23° (1987) 0.09" NA
Nov 5 10.6° -15° (1951) 24° (1978) 0.09" NA
Nov 6 10.6° -9° (1930) 23° (1924) 0.1" NA
Nov 7 10° -14° (1991) 24° (1916) 0.1" NA
Nov 8 -0.6° 9.4° -17° (1925) 26° (1915) 0.1" NA
Nov 9 -0.6° 9.4° -14° (1925) 24° (1999) 0.1" NA
Nov 10 -0.6° 8.9° -10° (1933) 25° (1999) 0.1" NA
Nov 11 -1.1° 8.9° -13° (1950) 26° (1901) 0.1" NA
Nov 12 -1.1° 8.3° -13° (1921) 24° (1911) 0.1" NA
Nov 13 -1.7° 8.3° -16° (1986) 22° (1944) 0.1" NA
Nov 14 -1.7° 7.8° -15° (1986) 24° (1971) 0.1" NA
Nov 15 -1.7° 7.8° -15° (1959) 21° (1909) 0.1" NA
Nov 16 -2.2° 7.2° -16° (1933) 24° (1931) 0.1" NA
Nov 17 -2.2° 6.7° -18° (1959) 23° (1931) 0.1" NA
Nov 18 -2.2° 6.7° -16° (1901) 22° (1953) 0.1" NA
Nov 19 -2.8° 6.1° -12° (1951) 24° (1930) 0.09" NA
Nov 20 -2.8° 6.1° -14° (1914) 21° (1930) 0.09" NA
Nov 21 -3.3° 5.6° -16° (1926) 21° (1913) 0.09" NA
Nov 22 -3.3° 5.6° -17° (1929) 23° (1913) 0.09" NA
Nov 23 -3.3° -16° (1950) 21° (1913) 0.09" NA
Nov 24 -3.9° -22° (1950) 19° (1931) 0.09" NA
Nov 25 -3.9° 4.4° -19° (1950) 17° (2001) 0.09" NA
Nov 26 -4.4° 4.4° -22° (1977) 19° (1927) 0.09" NA
Nov 27 -4.4° 3.9° -17° (1930) 20° (1914) 0.09" NA
Nov 28 -5° 3.9° -18° (1976) 18° (1909) 0.09" NA
Nov 29 -5° 3.3° -22° (1976) 19° (1941) 0.09" NA
Nov 30 -5° 3.3° -22° (1947) 19° (1962) 0.08" NA
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