Weather
Central Texas Weather Oct. 13-16: 107° Heat Index, Then Cooldown
San Antonio, TX – South Central Texas residents face another unusually hot and humid day Tuesday, October 13, with heat index values potentially reaching 107 degrees in some areas before a significant
By Miles Carter · 2026-10-13T08:54:59.970Z
San Antonio, TX – South Central Texas residents face another unusually hot and humid day Tuesday, October 13, with heat index values potentially reaching 107 degrees in some areas before a significant temperature change brings cooler conditions later this week.
According to the National Weather Service Austin San Antonio, afternoon temperatures Tuesday are expected to climb into the 90s across much of the region, with breezy conditions and high humidity making it feel even hotter.
Heat Index Could Reach 107 Degrees Tuesday
The Coastal Plains are forecast to reach 93 to 96 degrees, with maximum heat index values between 102 and 107 degrees.
Along the Interstate 35 corridor, including Austin and San Antonio, highs are expected to reach 92 to 95 degrees, with heat index readings approaching 99 to 105 degrees.
The Rio Grande Plains could see some of the hottest actual temperatures, ranging from 94 to 99 degrees.
Residents spending extended periods outdoors should stay hydrated, take breaks from the heat and watch for symptoms of heat related illness.
Cooler Temperatures Arrive Later This Week
A shift toward northerly winds will bring noticeably cooler conditions across South Central Texas.
San Antonio is forecast to reach around 90 degrees Wednesday before cooling to approximately 80 degrees Friday, October 16.
Austin could fall from 92 degrees Wednesday to 79 degrees Friday, while New Braunfels is expected to experience a similar temperature decline.
Overnight lows will also become more comfortable, with some communities falling into the upper 50s and lower 60s by the weekend.
Heavy Rain Possible Near Del Rio
Periodic rain chances will continue across portions of the region as the weather pattern changes.
The National Weather Service indicates locally heavy rainfall is possible across portions of Val Verde County late Wednesday night, October 14, into Thursday and Friday, October 15 16.
Communities near Del Rio should monitor updated forecasts for potential rainfall impacts.
While the broader region will experience changing temperatures, the heavier rainfall potential is more localized.
Residents should continue checking National Weather Service updates as the cooler weather and rain chances develop through Friday.