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
Oct 1 48° 73° 30° (1966) 90° (1971) 0.09" NA
Oct 2 47° 73° 30° (1961) 89° (1971) 0.09" NA
Oct 3 47° 73° 30° (1952) 89° (1954) 0.09" NA
Oct 4 46° 72° 29° (1989) 89° (1954) 0.09" NA
Oct 5 46° 72° 27° (1980) 89° (1997) 0.09" NA
Oct 6 46° 71° 25° (1952) 90° (1963) 0.09" NA
Oct 7 45° 71° 27° (2001) 86° (1997) 0.08" NA
Oct 8 45° 70° 26° (1952) 86° (1997) 0.08" NA
Oct 9 44° 70° 26° (2000) 86° (1997) 0.08" NA
Oct 10 44° 70° 24° (1964) 83° (1962) 0.08" NA
Oct 11 44° 69° 27° (1996) 85° (1962) 0.08" NA
Oct 12 43° 69° 25° (1987) 83° (1995) 0.08" NA
Oct 13 43° 68° 23° (1988) 86° (1975) 0.08" NA
Oct 14 43° 68° 26° (1979) 85° (1975) 0.08" NA
Oct 15 42° 67° 27° (2006) 85° (1968) 0.08" NA
Oct 16 42° 67° 26° (1970) 83° (1968) 0.08" NA
Oct 17 42° 66° 26° (1992) 85° (1950) 0.08" NA
Oct 18 41° 66° 24° (1952) 85° (1950) 0.08" NA
Oct 19 41° 65° 20° (1992) 84° (1953) 0.08" NA
Oct 20 41° 65° 22° (1972) 84° (1953) 0.08" NA
Oct 21 40° 64° 22° (1952) 84° (1953) 0.08" NA
Oct 22 40° 64° 23° (1982) 84° (1953) 0.09" NA
Oct 23 40° 63° 22° (1969) 81° (1963) 0.09" NA
Oct 24 39° 63° 17° (1981) 84° (1973) 0.09" NA
Oct 25 39° 62° 23° (1988) 78° (1973) 0.09" NA
Oct 26 39° 62° 19° (1962) 80° (1963) 0.09" NA
Oct 27 38° 61° 25° (1969) 77° (1989) 0.09" NA
Oct 28 38° 60° 18° (1976) 83° (1999) 0.09" NA
Oct 29 38° 60° 18° (1980) 84° (1999) 0.09" NA
Oct 30 37° 59° 14° (1988) 83° (1950) 0.1" NA
Oct 31 37° 59° 21° (1988) 83° (1950) 0.1" NA
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