All-time weather records — Port Isabel, TX

Record high
114.1°F
May 4, 1984
Record low
0.0°F
January 13, 2010
Wettest day
12.00 in
September 19, 1984

Climate change signal in Port Isabel

14.5%

of Port Isabel's all-time daily heat records were set in the last decade (53 of 366 records since 2015).

6.3%

of all-time daily cold records were set in the last decade (23 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
·
·
1900s
·
·
1920s
9
7
1930s
33
45
1940s
26
75
1950s
31
25
1960s
20
31
1970s
9
16
1980s
22
46
1990s
22
24
2000s
108
30
2010s
33
44
2020s
53
23

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 1928, the latest in 2026. Period of observation: 1896-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 89.1°F — Jan 12, 1936 0.0°F — Jan 13, 2010 3.70 in — Jan 16, 1988
February 91.0°F — Feb 3, 2006 19.9°F — Feb 7, 2008 2.83 in — Feb 22, 1958
March 100.0°F — Mar 28, 1984 6.1°F — Mar 17, 2011 8.50 in — Mar 28, 2025
April 98.1°F — Apr 1, 1989 26.1°F — Apr 1, 2010 7.45 in — Apr 23, 1956
May 114.1°F — May 4, 1984 46.9°F — May 10, 2020 5.04 in — May 29, 1929
June 100.9°F — Jun 14, 1985 59.0°F — Jun 7, 1988 6.60 in — Jun 22, 1941
July 105.1°F — Jul 4, 1985 66.0°F — Jul 28, 1942 5.15 in — Jul 31, 1978
August 100.9°F — Aug 30, 2012 60.1°F — Aug 5, 2001 5.05 in — Aug 26, 1945
September 102.9°F — Sep 8, 2002 55.0°F — Sep 23, 1995 12.00 in — Sep 19, 1984
October 96.1°F — Oct 21, 1941 37.0°F — Oct 31, 1993 5.97 in — Oct 14, 1932
November 95.0°F — Nov 5, 1988 28.9°F — Nov 28, 2011 7.80 in — Nov 1, 2002
December 90.0°F — Dec 6, 1977 17.1°F — Dec 23, 1989 6.00 in — Dec 21, 1940

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