San Antonio, Texas – South Texans are staring down another sweltering stretch as San Antonio pushes past 100 degrees through Friday, with dangerous heat index values peaking near 104. Relief may arrive by the weekend, but it comes with a growing chance of thunderstorms that could disrupt holiday plans.
According to the National Weather Service, Friday will be the hottest day, topping out near 101 before isolated storms build into Saturday afternoon. By Saturday night, scattered thunderstorms are expected across Bexar County and surrounding areas, bringing a 30 percent chance of rain. Storm activity increases into Sunday and Labor Day, with showers possible both afternoons and evenings.
Drivers on I-35 and Loop 410 could face slick conditions during downpours, and outdoor gatherings may be interrupted by lightning and heavy rain. Residents are urged to limit time outdoors in peak heat, drink plenty of water, and secure outdoor equipment ahead of storm activity.
The unsettled pattern lingers into early next week, with Monday and Tuesday carrying additional storm chances before conditions trend drier by midweek.
Five Day Forecast for San Antonio, TX
- Friday: Sunny and hot, high near 101. Mostly clear overnight, low around 78.
- Saturday: Mostly sunny, high near 99. 30% chance of storms after 1 p.m. Evening storms possible, low near 78.
- Sunday: Partly sunny, high near 94. 40% chance of storms, mainly afternoon and night. Low around 78.
- Labor Day (Monday): Partly sunny, high near 91. 30% chance of showers and storms. Low near 75.
- Tuesday: Mostly sunny, high near 93. 20% chance of storms in the afternoon.
