San Antonio, TX – Storm chances and sizzling summer heat are converging on Central Texas as San Antonio heads into a storm-prone and steamy weekend. Drivers along I-35 should be alert for slick roads Friday afternoon as scattered thunderstorms develop after 1 p.m., paired with heat index values soaring to 100°F.
According to the National Weather Service Austin/San Antonio office, a slight chance of showers and thunderstorms remains in place each afternoon through Sunday, with daily highs holding steady near 94°F. Friday brings the first round of storm potential, mainly between 1 p.m. and 4 p.m., followed by additional isolated activity Saturday and Sunday afternoons. Winds from the south-southeast at 5–15 mph could gust up to 20 mph.
Though rain chances stay around 20% each day, the timing aligns with peak heat hours, increasing the risk of flash puddling or lightning delays. Those heading outdoors or traveling should stay weather-aware, hydrate regularly, and seek shelter during any thunderstorm activity.
Looking ahead, next week turns even hotter. Monday, July 14, through Wednesday, July 16, will bring mostly sunny skies and high temperatures climbing to 97°F. No significant rainfall is expected early next week.
⚠️ Key Takeaway: Prepare for midday storms Friday through Sunday, then a hotter and drier stretch beginning Monday.
📅 Five-Day Forecast: San Antonio, TX
- Friday (July 11): Mostly sunny, high near 94°F. Slight chance of PM storms. Heat index up to 100°F.
- Saturday (July 12): Mostly sunny, high near 94°F. 20% chance of PM storms.
- Sunday (July 13): Partly sunny, high near 94°F. Isolated storms after 1 p.m.
- Monday (July 14): Mostly sunny, hot. High near 95°F.
- Tuesday (July 15): Mostly sunny, high near 97°F. No rain expected.
