All-time weather records — Naperville, IL

Record high
105.1°F
July 14, 1995
Record low
-67.0°F
June 30, 1962
Wettest day
9.24 in
July 18, 1996

Climate change signal in Naperville

0%

of Naperville's all-time daily heat records were set in the last decade (0 of 366 records since 2015).

0%

of all-time daily cold records were set in the last decade (0 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1890s
8
9
1900s
·
·
1930s
28
6
1940s
50
44
1950s
41
49
1960s
23
63
1970s
39
85
1980s
68
59
1990s
69
32
2000s
40
19

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1895, the latest in 2007. Period of observation: 1895-2007.

Records by month

Month Hottest day Coldest day Wettest day
January 64.9°F — Jan 31, 1989 -26.0°F — Jan 20, 1985 2.89 in — Jan 12, 1960
February 73.9°F — Feb 25, 2000 -20.9°F — Feb 6, 1977 2.85 in — Feb 21, 1997
March 84.9°F — Mar 29, 1986 -11.9°F — Mar 8, 1943 3.39 in — Mar 19, 1948
April 91.0°F — Apr 30, 1942 3.9°F — Apr 7, 1982 5.60 in — Apr 5, 1947
May 95.0°F — May 20, 1938 25.0°F — May 10, 1966 3.79 in — May 10, 1990
June 102.9°F — Jun 25, 1988 -67.0°F — Jun 30, 1962 4.05 in — Jun 21, 1939
July 105.1°F — Jul 14, 1995 41.0°F — Jul 6, 1967 9.24 in — Jul 18, 1996
August 100.0°F — Aug 2, 1991 37.9°F — Aug 18, 1963 6.01 in — Aug 14, 1987
September 102.0°F — Sep 15, 1939 26.1°F — Sep 28, 1942 3.35 in — Sep 7, 1998
October 90.0°F — Oct 1, 1971 14.0°F — Oct 30, 1988 5.60 in — Oct 10, 1954
November 78.1°F — Nov 1, 1950 -4.0°F — Nov 24, 1950 2.98 in — Nov 11, 1995
December 70.0°F — Dec 5, 2001 -20.9°F — Dec 24, 1983 3.04 in — Dec 3, 1982

Click a month to see every daily record for that month in Naperville.