Extended Forecast (Copyright KSAT-12 2026 - All Rights Reserved)
FORECAST HIGHLIGHTS
HOT & DRY TODAY: Mostly sunny, with highs in the upper-90s
SMALL RAIN CHANCE SUNDAY: A few storms possible late in the day
AN UPDATE ON NEXT WEEK: Questions linger, rainfall still in forecast
FORECAST
STILL HOT THROUGH THE WEEKEND
Tired of the heat yet? Unfortunately, we won’t get any relief this weekend. Temperatures today through at least Monday will hold steady in the mid to upper-90s. We continue to top the list as the hottest September on record in San Antonio.
List of hottest Septembers on record in San Antonio. (Copyright KSAT-12 2026 - All Rights Reserved)
SUNDAY EVENING STORM
As our heat high shifts into Mexico, a few storms may show up late Sunday in the Hill Country. It’s possible a few of these could drift toward San Antonio. Rain chances sit at 20% Sunday evening.
Future radar for Sunday at 6pm. An isolated storm or two is possible. (Copyright KSAT-12 2026 - All Rights Reserved)
NEXT WEEK
Next week remains complicated. A storm system will swing toward Texas by midweek, however, the models have slowed the timing a bit. It is forecast to pull up moisture from what will be left of Hurricane Polo into Texas. Rain chances show up in the forecast Wednesday and Thursday, however, as we’ve been saying -- this is not a slam dunk forecast. A front will near the area on Wednesday. Slightly cooler weather is expected for Wednesday and Thursday.
Extended Forecast (Copyright KSAT-12 2026 - All Rights Reserved)
Daily Forecast
KSAT meteorologists keep you on top of the ever-changing South Texas weather.
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.