LAREDO — Sunny skies dominate South Texas Sunday, with highs reaching 100 to 107 degrees across the western half of the region and staying in the 90s closer to the coast. Heat index values climb as high as 113 degrees, with south to southeast winds of 10 to 20 mph doing little to offset the heat, according to the National Weather Service office in Corpus Christi.

The hottest readings cluster inland, with Laredo and Tilden both forecast to reach 107 degrees, followed closely by Cotulla and Freer at 106, and Alice and Beeville in the 103 to 105 range. Closer to the Gulf, temperatures ease into the 90s, with Port Lavaca and Rockport both expected near 92 to 93 degrees, and Victoria sitting higher at 104.

Why the Inland-to-Coast Temperature Split Matters

The roughly 15-degree gap between inland cities like Laredo and coastal communities like Port Lavaca reflects how much moderating influence the Gulf of Mexico has on temperatures even during an intense heat event like this one. That split matters practically: residents further inland across Webb, McMullen and Duval counties face genuinely more dangerous heat, with actual air temperatures alone approaching 107 degrees before factoring in humidity, while coastal residents see comparatively milder conditions, even if the heat index still climbs into oppressive territory closer to shore.

What to Watch For as Sunday’s Heat Peaks

As of this writing, this outlook was issued at 1:20 a.m. CDT and reflects Sunday’s expected conditions across South Texas. No heat advisories or excessive heat warnings specific to this outlook were included in the data provided. This article will be updated if the National Weather Service issues formal heat alerts or if conditions shift from this forecast.

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