San Antonio

San Antonio Braces for Week of Intense Heat and Possible Showers, NWS Reports

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Published on September 20, 2025
San Antonio Braces for Week of Intense Heat and Possible Showers, NWS ReportsSource: Google Street View

As San Antonians ready themselves for the week ahead, the National Weather Service predicts a consistent dance of searing heat and sporadic, yet possible, relief from showers and thunderstorms. According to the National Weather Service forecast, today the city expects a mostly sunny sky with the mercury nudging a high near 95 degrees, calm winds becoming a light southeast breeze come afternoon.

Saturday night will be clear with a low near 74 and a southeast wind at 5 to 10 mph. Sunday will be mostly sunny with a high around 95, a heat index near 100, and similar winds. Sunday night will stay mild with a low around 75.

Monday will be mostly sunny with a high near 97 and south-southeast winds at 5 to 10 mph, with gusts up to 20 mph at night. Lows will be around 76. Tuesday brings a 20% chance of afternoon showers and thunderstorms, with a high near 99.

Wednesday has a 40% chance of showers and thunderstorms after 1 p.m., with a high near 95 and light northeast winds. Wednesday night will be partly cloudy with a 20% chance of showers and a low around 73. Thursday will be partly sunny with a 20% chance of thunderstorms and a high near 93. Friday will be mostly sunny with a high near 93.