San Antonio, Texas – Triple-digit heat index and a chance of afternoon storms are setting up a steamy and stormy Wednesday across San Antonio.
According to the National Weather Service, scattered thunderstorms may begin to form after 1 p.m. Wednesday, bringing brief downpours, gusty winds, and lightning across Bexar County. Daytime highs will climb near 92°F, but it will feel closer to 100°F due to the humidity. Light east winds will shift southeast by the afternoon at 5 to 10 mph.
Residents should stay weather-aware on Wednesday, especially those commuting along I-35 or I-10 during the afternoon. While storms are expected to remain isolated, quick cloudbursts could reduce visibility and slick roads. Outdoor workers and those without air conditioning are urged to hydrate and limit strenuous activity during peak heat hours.
The storm threat clears out Wednesday night, leaving San Antonio partly cloudy and warm. Temperatures remain elevated into the weekend, with highs near 94°F Thursday through Saturday and lows in the mid-70s. No major storm systems are expected after midweek, but high humidity will keep the heat index pushing into the upper 90s daily.
Warnings for extreme heat or additional storm advisories could be issued later this week.
📅 Five-Day Forecast for San Antonio (June 25–29):
- Tuesday (June 25): Mostly cloudy early, then sunny. High 93°F.
- Wednesday: Partly sunny. 20% chance of PM thunderstorms. High 92°F.
- Thursday: Mostly sunny and dry. High 93°F, low 73°F.
- Friday: Mostly sunny and humid. High 94°F, low 75°F.
- Saturday: Hot and mostly sunny. High 94°F. Slight southeast breeze.
