San Antonio

San Antonio Braces for Sweltering Highs of 99 Degrees as Weekend Showers May Bring Relief

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Published on August 28, 2025
San Antonio Braces for Sweltering Highs of 99 Degrees as Weekend Showers May Bring ReliefSource: Google Street View

The San Antonio area braces for another scorching day as temperatures are to definitely hit the high 90s, the National Weather Service reports. "Sunny and hot, with a high near 99. Heat index values as high as 103," stated the NWS forecast for today. Residents in the region should prepare for minimal wind support, with a south wind blowing at 5 to 10 mph. As the night approaches, the skies are set to remain mostly clear, guiding temperatures to a low near 78 degrees.

The situation is not expected to improve any time soon. Tomorrow's outlook promises to relatively keep up the intense heat, with temperatures scaling up to 101 degrees. "Heat index values as high as 105. South southeast wind around 5 mph," according to the same forecast on NWS. The weather pattern indicates a stubborn continuity of high temperatures coupled with modest wind conditions tomorrow night, with the low once again hovering around 78 degrees.

However, change is on the horizon for the weekend. There's a 30 percent chance of showers and thunderstorms post 1pm on Saturday. Despite this, temperatures will persist in being uncomfortably hot, nearly hitting 99 degrees. For San Antonians longing for a break from the heat, this forecast could suggest a subtle yet significant shift, presenting a slight chance of precipitation and potentially cooler temperatures Saturday night.

Looking ahead into Sunday and early next week, there appears to be growing potential for relief. "A 50 percent chance of showers and thunderstorms," projects the service for Sunday, as per NWS. While temperatures will slightly drop to a high near 94 degrees, the real respite might come as a series of intermittent showers and storms extend beyond Sunday night, which carries a 40 percent chance of precipitation. Labor Day continues this pattern with a 30 percent chance of sporadic showers and thunderstorms, potentially marking an end to the relentless stretch of dry heat.

The ongoing forecast marks a gradual transition as Tuesday offers a 20 percent chance of rain, with temperatures poised to stabilize in the low 90s. By Wednesday, the weather takes a drier turn yet again, ushering in mostly sunny skies and a high near 95 degrees.