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
Aug 1 63° 87° 49° (1984) 98° (1988) 0.14" NA
Aug 2 63° 87° 50° (1976) 100° (1991) 0.15" NA
Aug 3 63° 87° 45° (1976) 98° (1991) 0.15" NA
Aug 4 63° 86° 47° (1972) 96° (1988) 0.15" NA
Aug 5 63° 86° 45° (1972) 93° (1988) 0.15" NA
Aug 6 63° 86° 46° (1994) 95° (1968) 0.15" NA
Aug 7 63° 86° 48° (1975) 96° (2001) 0.15" NA
Aug 8 63° 86° 45° (1976) 98° (1988) 0.15" NA
Aug 9 63° 86° 47° (1976) 97° (1983) 0.15" NA
Aug 10 63° 86° 45° (1972) 95° (2001) 0.15" NA
Aug 11 63° 86° 48° (1967) 95° (2002) 0.15" NA
Aug 12 62° 86° 43° (1967) 99° (1995) 0.15" NA
Aug 13 62° 86° 43° (1967) 98° (1995) 0.15" NA
Aug 14 62° 85° 47° (1964) 96° (1995) 0.15" NA
Aug 15 62° 85° 44° (2004) 96° (1995) 0.15" NA
Aug 16 62° 85° 43° (1979) 99° (1988) 0.15" NA
Aug 17 62° 85° 42° (1976) 99° (1988) 0.15" NA
Aug 18 61° 85° 38° (1963) 98° (1988) 0.15" NA
Aug 19 61° 85° 44° (1963) 98° (1983) 0.15" NA
Aug 20 61° 85° 42° (1950) 95° (1955) 0.15" NA
Aug 21 61° 84° 42° (1950) 97° (1955) 0.15" NA
Aug 22 61° 84° 47° (1969) 95° (1983) 0.15" NA
Aug 23 61° 84° 47° (1952) 95° (1962) 0.15" NA
Aug 24 60° 84° 47° (1966) 95° (1991) 0.15" NA
Aug 25 60° 84° 44° (1977) 98° (1991) 0.15" NA
Aug 26 60° 84° 47° (1964) 96° (1953) 0.15" NA
Aug 27 60° 83° 44° (1968) 96° (1973) 0.15" NA
Aug 28 59° 83° 42° (1982) 96° (1984) 0.14" NA
Aug 29 59° 83° 42° (1965) 97° (1984) 0.14" NA
Aug 30 59° 83° 44° (1976) 97° (1953) 0.14" NA
Aug 31 58° 83° 44° (1967) 99° (1953) 0.14" NA
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