All-time weather records — Mount Vernon, TX

Record high
111.9°F
August 3, 2011
Record low
-5.1°F
December 23, 1989
Wettest day
8.42 in
December 28, 2015

Climate change signal in Mount Vernon

20.2%

of Mount Vernon's all-time daily heat records were set in the last decade (74 of 366 records since 2015).

7.7%

of all-time daily cold records were set in the last decade (28 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 #
1960s
14
45
1970s
42
102
1980s
36
95
1990s
38
38
2000s
98
36
2010s
98
26
2020s
40
24

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 1966, the latest in 2026. Period of observation: 1966-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 82.0°F — Jan 2, 2006 1.9°F — Jan 11, 1982 4.13 in — Jan 3, 2015
February 90.0°F — Feb 22, 1996 1.0°F — Feb 16, 2021 4.22 in — Feb 16, 2001
March 90.0°F — Mar 11, 2006 10.9°F — Mar 3, 1980 4.36 in — Mar 8, 1990
April 97.0°F — Apr 18, 2006 25.0°F — Apr 8, 2007 3.91 in — Apr 21, 2024
May 97.0°F — May 23, 2005 39.0°F — May 3, 2013 3.94 in — May 3, 2009
June 105.1°F — Jun 12, 2007 39.9°F — Jun 24, 2001 4.89 in — Jun 29, 1992
July 109.0°F — Jul 22, 2018 48.9°F — Jul 18, 2007 6.10 in — Jul 23, 1990
August 111.9°F — Aug 3, 2011 48.9°F — Aug 13, 1967 5.70 in — Aug 13, 2017
September 108.0°F — Sep 5, 2000 37.9°F — Sep 29, 1967 4.82 in — Sep 6, 1973
October 96.1°F — Oct 2, 2006 23.0°F — Oct 31, 1993 5.83 in — Oct 19, 2002
November 89.1°F — Nov 4, 2017 12.9°F — Nov 29, 1976 5.76 in — Nov 1, 1977
December 84.0°F — Dec 4, 2005 -5.1°F — Dec 23, 1989 8.42 in — Dec 28, 2015

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