Sterling/Rock Falls, 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
Feb 1 12° 30° -22° (1918) 64° (1989) 0.05" 0.3"
Feb 2 12° 30° -21° (1951) 54° (1927) 0.04" 0.2"
Feb 3 12° 30° -23° (1996) 55° (1927) 0.04" 0.3"
Feb 4 12° 30° -23° (1996) 52° (1992) 0.05" 0.2"
Feb 5 13° 31° -20° (1936) 58° (1909) 0.04" 0.2"
Feb 6 13° 31° -25° (1982) 56° (1946) 0.05" 0.3"
Feb 7 13° 31° -26° (1982) 48° (2005) 0.05" 0.2"
Feb 8 13° 31° -17° (1905) 57° (1925) 0.05" 0.3"
Feb 9 14° 32° -23° (1933) 60° (1990) 0.05" 0.2"
Feb 10 14° 32° -20° (1982) 57° (1976) 0.05" 0.2"
Feb 11 14° 32° -20° (1982) 61° (1999) 0.05" 0.2"
Feb 12 15° 32° -22° (1981) 68° (1999) 0.06" 0.2"
Feb 13 15° 33° -27° (1905) 60° (1938) 0.05" 0.2"
Feb 14 15° 33° -16° (1905) 60° (1954) 0.06" 0.2"
Feb 15 16° 33° -17° (1905) 70° (1921) 0.05" 0.2"
Feb 16 16° 34° -15° (1905) 64° (1921) 0.06" 0.2"
Feb 17 16° 34° -14° (1903) 57° (1911) 0.05" 0.2"
Feb 18 17° 34° -20° (1936) 59° (1981) 0.07" 0.1"
Feb 19 17° 35° -20° (1936) 65° (1930) 0.06" 0.2"
Feb 20 17° 35° -22° (1929) 63° (1930) 0.06" 0.2"
Feb 21 18° 36° -10° (1963) 65° (1930) 0.06" 0.2"
Feb 22 18° 36° -16° (1936) 65° (1922) 0.07" 0.2"
Feb 23 19° 36° -10° (1910) 63° (1930) 0.07" 0.2"
Feb 24 19° 37° -11° (1910) 65° (1930) 0.06" 0.2"
Feb 25 20° 37° -13° (1940) 66° (1932) 0.07" 0.1"
Feb 26 20° 38° -13° (1950) 71° (2000) 0.07" 0.2"
Feb 27 20° 38° -10° (1994) 69° (1976) 0.07" 0.2"
Feb 28 21° 38° -4° (1901) 63° (1932) 0.07" 0.2"
Feb 29 21° 39° -2° (1980) 63° (1932) 0.07" NA
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