San Antonio, Texas – High heat and rising storm chances will define the start of fall in South Central Texas this week. Daytime highs near 97°F could put added stress on roadways like I-10 by Sunday, with rain and thunderstorm chances reentering the picture by Tuesday afternoon.
According to the National Weather Service in Austin-San Antonio, a ridge of high pressure will keep skies sunny and conditions dry through Monday. But beginning Tuesday afternoon, a surge of Gulf moisture will bring a 30% chance of showers and thunderstorms to the region—especially east of downtown and near the I-35 corridor. Rain chances taper slightly midweek, but minor flooding could still impact low-lying roads.
Drivers should stay alert during Tuesday’s afternoon commute, especially along I-10, Loop 410, and US 281. Brief downpours and reduced visibility are possible. Use extra caution and allow for additional travel time.
Air conditioning demand will remain high through Monday, with heat indices potentially exceeding 100°F. Residents are urged to limit outdoor activity, stay hydrated, and check on elderly neighbors or pets. Power outages aren’t expected but keep mobile devices charged ahead of Tuesday’s storms.
Rain chances drop to 20% by midweek, with drier air pushing back into the region by Thursday. Expect calmer, warmer days to return to end the week.
Five-Day Forecast for San Antonio, Texas:
- Saturday: Sunny, high near 95°F. Light southeast wind.
- Sunday: Sunny, high near 97°F. South wind 5–10 mph.
- Monday: Mostly sunny, high near 97°F. Low around 76°F.
- Tuesday: 30% chance of PM showers and storms. High near 98°F.
- Wednesday: 20% chance of rain, then clearing. High near 95°F.
