Sterling/Rock Falls, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 10° 26° -27° (1999) 65° (2004) 1.6" 9"
February 15° 32° -27° (1905) 71° (2000) 1.43" 6.8"
March 27° 44° -13° (2002) 87° (1986) 2.55" 5"
April 37° 58° 8° (1982) 93° (1986) 3.61" 1.3"
May 48° 70° 24° (2005) 105° (1934) 4.32" 0"
June 58° 79° 34° (1945) 106° (1934) 4.88" 0"
July 62° 82° 43° (1904) 110° (1936) 3.45" 0"
August 60° 80° 37° (1934) 103° (1988) 4.47" 0"
September 51° 73° 22° (1942) 102° (1939) 3.31" 0"
October 39° 62° 7° (1925) 93° (1963) 2.71" 0.2"
November 28° 45° -8° (1977) 81° (1933) 2.82" 1.5"
December 17° 31° -25° (1983) 68° (1998) 2.13" 9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jun 1 54° 75° 38° (1993) 106° (1934) 0.16" NA
Jun 2 54° 76° 40° (1906) 101° (1934) 0.16" NA
Jun 3 55° 76° 36° (1946) 98° (1934) 0.17" NA
Jun 4 55° 76° 38° (1924) 98° (1934) 0.17" NA
Jun 5 55° 76° 34° (1945) 95° (1911) 0.17" NA
Jun 6 56° 77° 42° (2000) 97° (1933) 0.17" NA
Jun 7 56° 77° 37° (1935) 97° (1963) 0.17" NA
Jun 8 56° 77° 39° (1913) 99° (1934) 0.17" NA
Jun 9 57° 78° 38° (1901) 95° (1968) 0.17" NA
Jun 10 57° 78° 38° (1972) 99° (1911) 0.17" NA
Jun 11 57° 78° 36° (1972) 99° (1911) 0.17" NA
Jun 12 57° 78° 39° (1903) 94° (1901) 0.17" NA
Jun 13 58° 79° 41° (1933) 97° (1976) 0.17" NA
Jun 14 58° 79° 38° (1939) 94° (1943) 0.17" NA
Jun 15 58° 79° 40° (1927) 93° (1934) 0.17" NA
Jun 16 58° 79° 42° (1908) 96° (1939) 0.17" NA
Jun 17 59° 79° 43° (1980) 98° (1913) 0.17" NA
Jun 18 59° 80° 46° (1920) 94° (1913) 0.17" NA
Jun 19 59° 80° 45° (1945) 99° (1994) 0.17" NA
Jun 20 59° 80° 42° (1914) 99° (1933) 0.16" NA
Jun 21 59° 80° 40° (1992) 97° (1933) 0.16" NA
Jun 22 60° 80° 42° (1963) 98° (1988) 0.16" NA
Jun 23 60° 80° 41° (1936) 99° (1911) 0.16" NA
Jun 24 60° 81° 43° (1936) 99° (1901) 0.16" NA
Jun 25 60° 81° 46° (1979) 100° (1937) 0.15" NA
Jun 26 60° 81° 46° (1926) 100° (1931) 0.15" NA
Jun 27 61° 81° 45° (1905) 101° (1931) 0.15" NA
Jun 28 61° 81° 43° (1925) 102° (1931) 0.14" NA
Jun 29 61° 81° 44° (1923) 102° (1931) 0.14" NA
Jun 30 61° 81° 41° (1943) 103° (1931) 0.14" NA
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