Rockford, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 27° -27° (1982) 63° (1989) 1.41" 10.3"
February 16° 33° -25° (1933) 70° (2000) 1.34" 7.9"
March 27° 46° -11° (2002) 85° (1986) 2.39" 5.6"
April 37° 59° 5° (1982) 93° (1930) 3.62" 1.4"
May 48° 71° 24° (1966) 106° (1934) 4.03" 0"
June 58° 80° 35° (1945) 106° (1934) 4.8" 0"
July 63° 83° 43° (1967) 112° (1936) 4.1" 0"
August 61° 81° 35° (1915) 104° (1988) 4.21" 0"
September 52° 74° 24° (1942) 103° (1939) 3.47" 0"
October 40° 62° 7° (1925) 91° (1922) 2.57" 0.1"
November 29° 46° -10° (1977) 81° (1933) 2.63" 2.6"
December 17° 32° -24° (1983) 67° (2001) 2.06" 10.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 23° 38° -3° (1966) 62° (1970) 0.08" NA
Dec 2 22° 37° -4° (1976) 64° (1982) 0.08" NA
Dec 3 22° 37° -14° (1940) 65° (1970) 0.08" NA
Dec 4 21° 36° -4° (1991) 65° (1998) 0.08" NA
Dec 5 21° 36° -5° (2005) 67° (2001) 0.08" NA
Dec 6 20° 35° -10° (1964) 60° (1980) 0.08" NA
Dec 7 20° 35° -11° (1977) 64° (1916) 0.07" NA
Dec 8 20° 34° -6° (1958) 60° (1991) 0.07" NA
Dec 9 19° 34° -12° (1958) 54° (1939) 0.07" NA
Dec 10 19° 34° -20° (1919) 57° (1911) 0.07" NA
Dec 11 18° 33° -18° (1972) 61° (1949) 0.07" NA
Dec 12 18° 33° -9° (2000) 60° (1991) 0.07" NA
Dec 13 18° 33° -14° (1958) 57° (1975) 0.07" NA
Dec 14 17° 32° -11° (1989) 58° (1975) 0.07" NA
Dec 15 17° 32° -16° (1989) 58° (1971) 0.07" NA
Dec 16 17° 32° -14° (1932) 58° (1984) 0.07" NA
Dec 17 16° 31° -12° (1945) 50° (2006) 0.07" NA
Dec 18 16° 31° -17° (1983) 55° (1941) 0.06" NA
Dec 19 16° 31° -21° (1983) 56° (1988) 0.06" NA
Dec 20 15° 30° -20° (1963) 59° (1949) 0.06" NA
Dec 21 15° 30° -20° (1963) 56° (1967) 0.06" NA
Dec 22 15° 30° -19° (1989) 55° (1957) 0.06" NA
Dec 23 14° 30° -21° (1983) 57° (1941) 0.06" NA
Dec 24 14° 29° -24° (1983) 55° (1982) 0.06" NA
Dec 25 14° 29° -22° (2000) 58° (1982) 0.06" NA
Dec 26 14° 29° -23° (1914) 54° (1905) 0.06" NA
Dec 27 13° 29° -19° (1950) 55° (1959) 0.06" NA
Dec 28 13° 28° -21° (1924) 66° (1984) 0.06" NA
Dec 29 13° 28° -11° (1976) 65° (1984) 0.05" NA
Dec 30 12° 28° -12° (1963) 58° (2002) 0.05" NA
Dec 31 12° 28° -17° (1963) 56° (1965) 0.05" NA
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