All-time weather records — Flat Rock, IL

Record high
114.1°F
July 14, 1954
Record low
-27.0°F
February 13, 1899
Wettest day
6.10 in
July 11, 1958

Climate change signal in Flat Rock

2.5%

of Flat Rock's all-time daily heat records were set in the last decade (9 of 366 records since 2015).

1.6%

of all-time daily cold records were set in the last decade (6 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
15
26
1900s
20
32
1910s
27
25
1920s
33
44
1930s
74
37
1940s
26
33
1950s
61
27
1960s
20
35
1970s
9
16
1980s
28
48
1990s
15
15
2000s
25
16
2010s
13
12
2020s
·
·

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 1893, the latest in 2017. Period of observation: 1893-2023.

Records by month

Month Hottest day Coldest day Wettest day
January 75.0°F — Jan 24, 1943 -20.9°F — Jan 20, 1985 3.62 in — Jan 30, 1916
February 77.0°F — Mar 1, 1972 -27.0°F — Feb 13, 1899 2.70 in — Feb 7, 1999
March 89.1°F — Mar 6, 1983 -11.9°F — Mar 6, 1960 4.75 in — Mar 5, 1897
April 95.0°F — Apr 21, 1987 18.0°F — Apr 1, 2001 4.04 in — Apr 17, 2006
May 98.1°F — May 20, 1987 28.0°F — May 1, 1903 4.00 in — May 8, 1996
June 108.0°F — Jun 20, 1953 34.0°F — Jun 15, 1988 4.76 in — Jun 7, 2008
July 114.1°F — Jul 14, 1954 37.9°F — Jul 9, 1917 6.10 in — Jul 11, 1958
August 108.0°F — Aug 8, 1930 41.0°F — Aug 30, 1946 4.93 in — Aug 29, 1951
September 107.1°F — Sep 2, 1953 26.1°F — Sep 26, 1928 4.35 in — Sep 10, 2000
October 95.0°F — Oct 2, 1953 16.0°F — Oct 21, 1952 3.45 in — Oct 18, 1905
November 93.9°F — Nov 7, 2001 0.0°F — Nov 30, 1929 4.11 in — Nov 14, 1993
December 73.9°F — Dec 2, 1982 -20.0°F — Dec 28, 1924 3.94 in — Dec 3, 1982

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