Rochester, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 17° 33° -22° (1884) 73° (1909) 1.62" 7.4"
February 22° 39° -24° (1905) 78° (1930) 1.8" 5.8"
March 32° 51° -12° (1960) 91° (1907) 3.15" 3.4"
April 42° 63° 17° (1920) 90° (1986) 3.36" 0.7"
May 53° 74° 28° (1966) 101° (1934) 4.06" 0"
June 62° 83° 39° (2003) 104° (1934) 3.77" 0"
July 66° 87° 48° (1975) 112° (1954) 3.53" 0"
August 64° 85° 43° (1986) 108° (1934) 3.41" 0"
September 55° 79° 31° (1899) 101° (1984) 2.83" 0"
October 44° 67° 13° (1925) 93° (2006) 2.62" 0"
November 34° 51° -3° (1964) 83° (1950) 2.87" 1.6"
December 23° 38° -21° (1989) 74° (1984) 2.54" 6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Aug 1 66° 86° 52° (1962) 99° (1987) 0.11" NA
Aug 2 66° 86° 53° (1927) 101° (1964) 0.11" NA
Aug 3 66° 86° 50° (1950) 103° (1964) 0.11" NA
Aug 4 66° 86° 51° (1912) 106° (1918) 0.11" NA
Aug 5 66° 86° 52° (1948) 105° (1918) 0.11" NA
Aug 6 66° 86° 49° (1997) 102° (1947) 0.11" NA
Aug 7 66° 86° 49° (1989) 103° (1934) 0.11" NA
Aug 8 65° 86° 49° (1976) 108° (1934) 0.11" NA
Aug 9 65° 85° 49° (1972) 108° (1934) 0.11" NA
Aug 10 65° 85° 51° (1972) 100° (1938) 0.11" NA
Aug 11 65° 85° 46° (2004) 101° (1941) 0.11" NA
Aug 12 65° 85° 45° (2004) 102° (1918) 0.11" NA
Aug 13 65° 85° 43° (1964) 103° (1936) 0.11" NA
Aug 14 65° 85° 51° (2004) 98° (1936) 0.11" NA
Aug 15 64° 85° 47° (2004) 100° (1936) 0.11" NA
Aug 16 64° 85° 47° (2004) 102° (1988) 0.11" NA
Aug 17 64° 84° 53° (1992) 101° (1988) 0.11" NA
Aug 18 64° 84° 49° (1963) 106° (1936) 0.11" NA
Aug 19 64° 84° 51° (1950) 100° (1936) 0.11" NA
Aug 20 63° 84° 46° (1950) 101° (1983) 0.11" NA
Aug 21 63° 84° 44° (1950) 104° (1936) 0.11" NA
Aug 22 63° 84° 51° (1950) 104° (1936) 0.11" NA
Aug 23 63° 84° 48° (1890) 101° (1936) 0.11" NA
Aug 24 62° 84° 49° (1966) 101° (1947) 0.11" NA
Aug 25 62° 83° 45° (1958) 100° (1936) 0.11" NA
Aug 26 62° 83° 48° (1885) 103° (1936) 0.11" NA
Aug 27 62° 83° 51° (1967) 97° (1983) 0.11" NA
Aug 28 61° 83° 44° (1986) 97° (2007) 0.11" NA
Aug 29 61° 83° 43° (1986) 99° (1984) 0.11" NA
Aug 30 61° 83° 48° (1986) 98° (1947) 0.11" NA
Aug 31 61° 82° 46° (1967) 99° (1943) 0.11" NA
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