San Antonio/ Weather & Environment

San Antonio’s Muggy Midweek Sprinkles Tease Wetter Thursday, Mostly Dry Halloween Weekend

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Published on October 28, 2026
San Antonio’s Muggy Midweek Sprinkles Tease Wetter Thursday, Mostly Dry Halloween WeekendSan Antonio City Hall Plaza — San Antonio Weather Backdrop
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San Antonio starts Wednesday under cloudy skies and muggy air, with temperatures in the upper 60s early and an afternoon high near 84 degrees. Spotty showers may develop between 10 a.m. and 1 p.m., followed by a slight chance of showers and thunderstorms through the afternoon.

A Brief Shower Chance Gives Way To A Wetter Thursday

Wednesday's rain should remain scattered, with an overall precipitation chance near 20% and east-southeast winds around 5 mph. A brief downpour is possible, but most of the day should stay partly sunny and warm.

Thursday brings the bigger weather shift, with a 40% chance of rain showers after 7 a.m., mostly cloudy skies and a high near 80. The National Weather Service says rain will be more persistent west of San Antonio, while some of it could spread into the Interstate 35 corridor during the day.

The updated outlook is somewhat less aggressive locally than Hoodline's Tuesday forecast, which called for higher rain chances Thursday and Friday. San Antonio now faces a 30% chance of showers Friday, mainly before 1 p.m., with a high near 78.

Halloween Weekend Looks Warm And Mostly Dry

Friday night should stay mostly cloudy with a low around 65, while Saturday brings mostly cloudy skies, a high near 82 and only a 10% rain chance. Saturday night looks partly cloudy with a low near 66, a decent setup for evening Halloween plans.

Sunday should be warmer and brighter, with partly sunny skies and a high near 84. Monday continues the mild stretch with a high near 85, although another chance of showers and thunderstorms arrives Monday night before cooler air moves in Tuesday.

Keep An Umbrella Handy, But Skip The Full Storm Plan

For Wednesday, a compact umbrella should cover the most likely inconvenience: a passing shower during the afternoon. No watches, warnings or advisories are listed for the San Antonio area, but Thursday's rain could still slow commutes and muddy outdoor plans, especially west of the city.