Janesville, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 20° 36° -27° (1994) 71° (1909) 2.49" 7.5"
February 25° 42° -23° (1905) 75° (1930) 2.6" 4.4"
March 34° 53° -14° (1960) 89° (1929) 2.89" 1.8"
April 44° 66° 17° (1982) 92° (1930) 4.29" 0.2"
May 53° 75° 26° (1925) 101° (1934) 4.62" 0"
June 62° 84° 35° (1945) 108° (1934) 4.35" 0"
July 66° 87° 45° (1947) 110° (1936) 4.47" 0"
August 64° 85° 39° (1915) 107° (1918) 2.93" 0"
September 56° 79° 26° (1942) 104° (1925) 3.24" 0"
October 46° 67° 11° (1925) 96° (1912) 3.76" 0"
November 36° 53° -2° (1929) 84° (1933) 3.97" 0.7"
December 25° 40° -20° (1989) 73° (1948) 3.15" 2.6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 21° 36° -12° (1968) 65° (1952) 0.09" 0.2"
Jan 2 21° 36° -9° (1928) 64° (2006) 0.1" 0.2"
Jan 3 21° 36° -14° (1904) 65° (1950) 0.08" 0.2"
Jan 4 21° 36° -9° (1920) 65° (1997) 0.1" 0.2"
Jan 5 21° 36° -17° (1999) 60° (1998) 0.09" 0.2"
Jan 6 21° 36° -10° (1924) 62° (1907) 0.09" 0.2"
Jan 7 21° 36° -22° (1912) 63° (1907) 0.09" 0.2"
Jan 8 21° 36° -10° (1970) 63° (1965) 0.09" 0.2"
Jan 9 21° 36° -8° (1970) 63° (1965) 0.08" 0.3"
Jan 10 20° 36° -19° (1982) 61° (1975) 0.09" 0.2"
Jan 11 20° 36° -14° (1977) 60° (1911) 0.09" 0.2"
Jan 12 20° 36° -21° (1918) 69° (1995) 0.08" 0.2"
Jan 13 20° 36° -21° (1912) 64° (1950) 0.08" 0.2"
Jan 14 20° 36° -11° (1957) 67° (1928) 0.07" 0.3"
Jan 15 20° 36° -21° (1927) 66° (1950) 0.07" 0.2"
Jan 16 20° 36° -14° (1912) 65° (1990) 0.08" 0.3"
Jan 17 20° 36° -20° (1977) 70° (1952) 0.07" 0.3"
Jan 18 20° 36° -20° (1930) 64° (1951) 0.07" 0.2"
Jan 19 20° 36° -27° (1994) 65° (1907) 0.07" 0.3"
Jan 20 20° 36° -22° (1985) 69° (1906) 0.07" 0.3"
Jan 21 20° 36° -18° (1984) 65° (1986) 0.07" 0.2"
Jan 22 20° 37° -14° (1936) 62° (1964) 0.08" 0.3"
Jan 23 20° 37° -17° (1936) 71° (1909) 0.07" 0.3"
Jan 24 20° 37° -24° (1915) 69° (1950) 0.07" 0.3"
Jan 25 20° 37° -8° (1940) 69° (1950) 0.08" 0.2"
Jan 26 21° 37° -9° (1936) 69° (1950) 0.07" 0.3"
Jan 27 21° 37° -17° (1904) 65° (1999) 0.07" 0.3"
Jan 28 21° 37° -13° (1936) 67° (1914) 0.08" 0.2"
Jan 29 21° 37° -13° (1977) 63° (1975) 0.08" 0.3"
Jan 30 21° 38° -12° (1936) 62° (1931) 0.09" 0.2"
Jan 31 21° 38° -12° (2004) 68° (1989) 0.08" 0.3"
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