Oswego, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 16° 30° -26° (1985) 66° (1989) 1.68" 7.8"
February 20° 35° -25° (1951) 72° (2000) 1.8" 6.8"
March 30° 47° -15° (1943) 83° (1986) 2.37" 2.5"
April 40° 60° 8° (1982) 92° (1930) 3.62" 0.6"
May 50° 71° 21° (1966) 104° (1934) 4.01" 0"
June 60° 80° 34° (1929) 106° (1934) 4.22" 0"
July 65° 84° 40° (1907) 111° (1936) 3.9" 0"
August 63° 82° 37° (1915) 105° (1934) 4.07" 0"
September 55° 75° 25° (1942) 103° (1939) 3.59" 0"
October 43° 62° 11° (1925) 90° (1971) 3.07" 0"
November 33° 48° -11° (1947) 81° (1950) 3.24" 0.8"
December 20° 34° -25° (1914) 69° (2001) 2.2" 8.6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Feb 1 17° 31° -15° (1918) 53° (1968) 0.05" 0.3"
Feb 2 17° 32° -25° (1951) 48° (1987) 0.04" 0.3"
Feb 3 17° 32° -20° (1996) 58° (1992) 0.05" 0.3"
Feb 4 17° 32° -19° (1996) 57° (1909) 0.04" 0.3"
Feb 5 18° 32° -19° (1979) 55° (1944) 0.05" 0.3"
Feb 6 18° 32° -19° (1977) 55° (1946) 0.05" 0.3"
Feb 7 18° 33° -18° (1977) 57° (2009) 0.05" 0.2"
Feb 8 18° 33° -17° (1951) 61° (1990) 0.05" 0.3"
Feb 9 18° 33° -20° (1933) 56° (1925) 0.05" 0.3"
Feb 10 19° 33° -14° (1982) 62° (2009) 0.06" 0.3"
Feb 11 19° 34° -12° (1936) 69° (1999) 0.05" 0.2"
Feb 12 19° 34° -14° (1967) 57° (1984) 0.06" 0.3"
Feb 13 19° 34° -25° (1905) 61° (1938) 0.06" 0.3"
Feb 14 20° 35° -17° (1905) 60° (1954) 0.06" 0.2"
Feb 15 20° 35° -15° (1905) 67° (1954) 0.06" 0.2"
Feb 16 20° 35° -14° (1903) 63° (1976) 0.06" 0.3"
Feb 17 21° 36° -14° (1903) 55° (1911) 0.07" 0.2"
Feb 18 21° 36° -19° (1936) 58° (1961) 0.06" 0.2"
Feb 19 21° 36° -14° (1936) 67° (1930) 0.07" 0.2"
Feb 20 21° 37° -16° (1929) 65° (1930) 0.07" 0.2"
Feb 21 22° 37° -9° (1963) 67° (1930) 0.07" 0.3"
Feb 22 22° 37° -11° (1963) 68° (1922) 0.07" 0.2"
Feb 23 22° 38° -11° (1910) 64° (2000) 0.08" 0.2"
Feb 24 23° 38° -8° (1950) 66° (1930) 0.08" 0.2"
Feb 25 23° 39° -9° (1967) 72° (2000) 0.07" 0.2"
Feb 26 23° 39° -8° (1967) 64° (1932) 0.08" 0.2"
Feb 27 24° 39° -9° (1934) 57° (1976) 0.08" 0.1"
Feb 28 24° 40° -1° (1901) 70° (1976) 0.08" 0.2"
Feb 29 24° 40° 0° (1980) 65° (2000) 0.08" NA
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