San Antonio

San Antonio Braces for Sizzling Heatwave, Temperatures to Hit 100 Degrees

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Published on July 23, 2025
San Antonio Braces for Sizzling Heatwave, Temperatures to Hit 100 DegreesSource: Google Street View

The weather in San Antonio is gearing up to continue its scorching trend, according to the latest forecasts. Residents should prepare for a streak of hot, mostly sunny days ahead, with the mercury poised to hit the high 90s and even cross the century mark.

Today's weather, reported by the National Weather Service, suggests a mostly cloudy morning that will evolve into clear skies as the day heats up to a high near 99 degrees. Heat index values could soar as high as 104, while south winds are expected to range from 5 to 10 mph, with potential gusts of up to 20 mph. The clear skies will carry over into tonight, with a low settling around 75 degrees and southeast winds maintaining the same 5 to 10 mph range.

Thursday will not offer much reprieve, bringing sunny and hot conditions with a high near 100 degrees and a heat index possibly reaching 103. Similar conditions are predicted for Friday, with forecasts calling for mostly sunny skies and a high near 97 degrees. The pattern suggests that a fan or air conditioning will be essential for those looking to stay cool.

As the week progresses, the chance of showers and thunderstorms sneaks into the forecast. Saturday shows a 30 percent chance of precipitation after 1 p.m., accompanied by partly sunny weather and a high near 93 degrees. The National Weather Service predicts that the slight chance of rain persists into the weekend, with Sunday offering a 20 percent chance of showers and thunderstorms after 1pm and a high nearing 96 degrees.

Starting off the next week, Monday's forecast returns to mostly sunny conditions with a high around 97 degrees. Those planning any outdoor activities should keep in mind that nighttime lows throughout this period are only expected to drop to the mid-70s, offering little relief from the daytime heat. San Antonio residents should remain vigilant in these elevated temperatures by staying hydrated, avoiding prolonged outdoor exposure during peak heat hours, and keeping a watchful eye on those most susceptible to heat-related stress.