All-time weather records — Mount Vernon, IN

Record high
109.0°F
July 24, 1901
Record low
-20.9°F
January 7, 1912
Wettest day
7.40 in
April 29, 1996

Climate change signal in Mount Vernon

3%

of Mount Vernon's all-time daily heat records were set in the last decade (11 of 366 records since 2015).

1.4%

of all-time daily cold records were set in the last decade (5 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 #
1880s
·
·
1890s
42
33
1900s
78
40
1910s
45
43
1920s
34
52
1930s
20
14
1940s
12
17
1950s
32
28
1960s
28
56
1970s
13
29
1980s
27
26
1990s
7
17
2000s
6
5
2010s
18
5
2020s
4
1

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 2026. Period of observation: 1888-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 73.0°F — Jan 24, 1943 -20.9°F — Jan 7, 1912 5.13 in — Jan 21, 1959
February 78.1°F — Feb 12, 1938 -18.9°F — Feb 13, 1899 3.30 in — Feb 19, 1914
March 90.0°F — Mar 24, 1929 -2.9°F — Mar 5, 1960 6.29 in — Mar 19, 2008
April 91.0°F — Apr 28, 1906 21.0°F — Apr 1, 1923 7.40 in — Apr 29, 1996
May 98.1°F — May 21, 1908 30.9°F — May 1, 1903 4.84 in — May 8, 1961
June 106.0°F — Jun 29, 2012 39.0°F — Jun 2, 1899 3.73 in — Jun 17, 2000
July 109.0°F — Jul 24, 1901 50.0°F — Jul 10, 1963 4.34 in — Jul 11, 1909
August 104.0°F — Aug 8, 1930 44.1°F — Aug 29, 1965 3.95 in — Aug 11, 1948
September 107.1°F — Sep 2, 1953 10.9°F — Sep 30, 1927 7.27 in — Sep 25, 1945
October 96.1°F — Oct 2, 1953 17.1°F — Oct 27, 2001 4.36 in — Oct 6, 1910
November 84.0°F — Nov 2, 2016 -0.9°F — Nov 25, 1950 3.20 in — Nov 15, 2005
December 77.0°F — Dec 3, 1982 -16.1°F — Dec 22, 1989 4.52 in — Dec 22, 2013

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