San Antonio

San Antonio Braces for Mixed Weather: Thunderstorms, High Heat, and Gusts This Week

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Published on August 16, 2025
San Antonio Braces for Mixed Weather: Thunderstorms, High Heat, and Gusts This WeekSource: Unsplash/ Breno Machado

San Antonio residents can expect a range of weather conditions this week, according to forecasts. With a high probability of rain to kick off the day, the city is expected to see possible thunderstorms before 10 am, although the afternoon should bring mostly sunny skies. The National Weather Service predicts a high near 96 degrees and heat index values as high as 104. The wind may get gusty, reaching up to 20 mph.

This evening's weather in San Antonio is less turbulent, showing only a 20 percent chance of showers and thunderstorms before 10 pm, and residents should expect a partly cloudy night with a low around 77 degrees. As we look to Sunday, the forecast calls for mostly sunny and hot, with a high near 99, and heat index values could edge up to a scorching 106 degrees. Similar conditions are expected for Monday, with predictions of a high near 100 degrees and calm winds shifting east southeast in the afternoon.

Going into the midweek, the chances of showers and thunderstorms increase. Tuesday holds a 30 percent chance of rain after 1 pm despite the heat. Wednesday will bring a 40 percent chance of precipitation, combined with equally high temperatures reaching up to 99 degrees again. 

Looking towards the end of the week, the likelihood of thunderstorms remains significant on Thursday, with a forecast indicating a 50 percent chance of showers and thunderstorms. Evenings may offer a slight respite, though there's still a 40 percent chance of showers. Friday appears to be cooler, with a high near 92 degrees and a maintained potential for showers and thunderstorms. Throughout the week, nightly lows will hover in the mid to high 70s.