Naperville, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 14° 32° -26° (1985) 65° (1989) 1.85" NA
February 19° 38° -21° (1977) 74° (2000) 1.56" NA
March 28° 50° -10° (1962) 85° (1986) 2.62" NA
April 38° 63° 4° (1982) 90° (2002) 3.8" NA
May 48° 75° 25° (1966) 95° (1967) 3.94" NA
June 57° 84° 32° (1972) 103° (1988) 3.91" NA
July 63° 87° 41° (1967) 105° (1995) 3.97" NA
August 61° 85° 38° (1963) 100° (1991) 4.6" NA
September 53° 78° 27° (1974) 100° (1953) 3.38" NA
October 42° 67° 14° (1988) 90° (1971) 2.66" NA
November 32° 50° -4° (1950) 78° (1978) 3.2" NA
December 20° 37° -21° (1983) 70° (2001) 2.45" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Feb 1 15° 34° -9° (1985) 61° (1989) 0.06" NA
Feb 2 16° 34° -20° (1976) 50° (1987) 0.05" NA
Feb 3 16° 34° -20° (1996) 55° (1992) 0.05" NA
Feb 4 16° 34° -16° (1996) 54° (1993) 0.05" NA
Feb 5 16° 35° -20° (1979) 57° (2005) 0.05" NA
Feb 6 16° 35° -21° (1977) 56° (2005) 0.05" NA
Feb 7 17° 35° -20° (1977) 50° (1987) 0.05" NA
Feb 8 17° 36° -13° (1951) 61° (1990) 0.05" NA
Feb 9 17° 36° -13° (1951) 60° (1990) 0.05" NA
Feb 10 18° 36° -12° (1982) 62° (1999) 0.05" NA
Feb 11 18° 37° -11° (1955) 70° (1999) 0.05" NA
Feb 12 18° 37° -18° (1967) 68° (1999) 0.05" NA
Feb 13 18° 37° -9° (1988) 55° (1990) 0.05" NA
Feb 14 19° 38° 0° (1970) 60° (1954) 0.06" NA
Feb 15 19° 38° -5° (1963) 66° (1954) 0.06" NA
Feb 16 19° 38° -11° (1958) 59° (1999) 0.06" NA
Feb 17 19° 39° -11° (1958) 57° (1961) 0.06" NA
Feb 18 20° 39° -11° (1978) 59° (1994) 0.06" NA
Feb 19 20° 39° -11° (1978) 60° (1994) 0.06" NA
Feb 20 20° 40° -5° (1959) 63° (1983) 0.06" NA
Feb 21 21° 40° -9° (1963) 60° (1983) 0.06" NA
Feb 22 21° 41° -8° (1963) 62° (1984) 0.06" NA
Feb 23 21° 41° -2° (1967) 68° (2000) 0.06" NA
Feb 24 22° 41° -8° (1967) 64° (1976) 0.06" NA
Feb 25 22° 42° -10° (1967) 74° (2000) 0.06" NA
Feb 26 22° 42° -7° (1967) 72° (2000) 0.06" NA
Feb 27 23° 43° -8° (1994) 70° (1976) 0.06" NA
Feb 28 23° 43° 5° (1962) 67° (1976) 0.06" NA
Feb 29 23° 43° 0° (1980) 67° (2000) 0.06" NA
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