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
Aug 1 62° 82° 49° (1925) 98° (1945) 0.15" 0"
Aug 2 62° 82° 48° (1927) 101° (1988) 0.13" 0"
Aug 3 62° 82° 42° (1912) 103° (1930) 0.14" 0"
Aug 4 62° 82° 45° (1912) 101° (1930) 0.13" 0"
Aug 5 62° 82° 46° (1910) 98° (1918) 0.13" 0"
Aug 6 62° 82° 46° (1910) 100° (1947) 0.14" 0"
Aug 7 62° 82° 46° (1903) 97° (1937) 0.13" 0"
Aug 8 62° 82° 45° (1904) 100° (1930) 0.14" 0"
Aug 9 62° 82° 45° (1927) 101° (1934) 0.14" 0"
Aug 10 61° 82° 48° (1982) 99° (1936) 0.14" 0"
Aug 11 61° 82° 44° (1982) 99° (1941) 0.14" 0"
Aug 12 61° 82° 43° (1903) 96° (1918) 0.15" 0"
Aug 13 61° 82° 47° (1931) 97° (1944) 0.15" 0"
Aug 14 61° 81° 43° (1904) 100° (1944) 0.16" 0"
Aug 15 61° 81° 46° (1929) 98° (1988) 0.16" 0"
Aug 16 61° 81° 46° (1992) 101° (1937) 0.15" 0"
Aug 17 61° 81° 48° (1924) 103° (1988) 0.17" 0"
Aug 18 61° 81° 44° (1963) 103° (1936) 0.16" 0"
Aug 19 61° 81° 47° (1932) 103° (1936) 0.16" 0"
Aug 20 60° 81° 40° (1950) 98° (1947) 0.15" 0"
Aug 21 60° 81° 41° (1950) 102° (1983) 0.14" 0"
Aug 22 60° 81° 43° (1923) 100° (1947) 0.15" 0"
Aug 23 60° 81° 45° (1920) 101° (1947) 0.14" 0"
Aug 24 60° 81° 40° (1942) 100° (1947) 0.15" 0"
Aug 25 60° 81° 40° (1934) 97° (1909) 0.14" 0"
Aug 26 59° 80° 41° (1934) 96° (2003) 0.14" 0"
Aug 27 59° 80° 44° (1915) 96° (1973) 0.15" 0"
Aug 28 59° 80° 40° (1915) 97° (1976) 0.15" 0"
Aug 29 59° 80° 37° (1934) 99° (1983) 0.14" 0"
Aug 30 58° 80° 40° (1915) 99° (1984) 0.14" 0"
Aug 31 58° 80° 39° (1915) 98° (1953) 0.14" 0"
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