The heaviest rainfall will be along the Rio Grande
Extended Forecast (Copyright KSAT-12 2026 – All Rights Reserved)FORECAST HIGHLIGHTS
OCCASSIONAL SHOWERS: Mainly light for San Antonio, today & Friday
HALLOWEEN: Likely dry, comfortable for trick-or-treating
COLD FRONT: Arrives Tuesday morning, small window for storms
FORECAST
OCCASSIONAL SHOWERS TODAY, FRIDAY
Showers have already begun to show up on radar this morning and the potential for occasional light rain will continue throughout the day. Otherwise, skies will stay cloudy. That’ll keep temperatures in the 70s. Expect a similar setup on Friday, with rain chances winding down by Friday evening. While totals around San Antonio will be less than 0.50″, heavier rain remains possible west of San Antonio, where 1-3″ could fall.
Rainfall totals, through Friday, will be highest west of I-35. (Copyright KSAT-12 2026 – All Rights Reserved)
HALLOWEEN UPDATE
Only an isolated shower or two is expected on Halloween (20%). Chances are good that trick-or-treating will be dry. Temperatures are forecast to be comfortable.
TUESDAY MORNING COLD FRONT
A cold front will sweep through Tuesday morning. A fast-moving, broken line of storms may develop along the front, with clearing quickly taking place by Tuesday afternoon. Expect gusty winds in the wake of the front and cooler temperatures.
A cold front is forecast to sweep through Tuesday morning. (Copyright KSAT-12 2026 – All Rights Reserved)Daily Forecast
KSAT meteorologists keep you on top of the ever-changing South Texas weather.
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Copyright 2026 by KSAT – All rights reserved.
About the AuthorJustin Horne headshot
Justin Horne
Justin Horne is a meteorologist and reporter for KSAT 12 News. When severe weather rolls through, Justin will hop in the KSAT 12 Storm Chaser to safely bring you the latest weather conditions from across South Texas. On top of delivering an accurate forecast, Justin often reports on one of his favorite topics: Texas history.