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A cold front arrives to San Antonio by early afternoon
SSan Antonio

A cold front arrives to San Antonio by early afternoon

  • December 18, 2025

It’ll clear out skies and bring gusty winds

A cold front arrives today by the early afternoon. (Copyright KSAT-12 2025 – All Rights Reserved)FORECAST HIGHLIGHTS

FOG & DRIZZLE ENDING: Less issues for today’s morning commute, skies clear

COLD FRONT EARLY AFTERNOON: Gusts of up to 30 mph with front, slightly cooler

UPDATED WEEKEND FORECAST: A cold front to bring changes to weekend temps

STILL WARM FOR CHRISTMAS: Temps running well-above average

FORECAST

TODAY’S FORECAST

Fog & drizzle are coming to an end and skies will clear later this morning. With sunshine, we’ll see a nice warm-up through midday. A cold front will move through just after lunchtime. While it won’t have a huge impact on temperatures, it will bring gusty winds. Gusts of up to 30mph from 1pm to roughly 4pm are possible.

Today’s Forecast (Copyright KSAT-12 2025 – All Rights Reserved)

WEEKEND CHANGES

The weekend forecast is trending cooler. On Saturday, lingering morning fog and clouds will keep temperatures in check. While we will see some afternoon sun, highs are now projected to only reach the low-70s. Additionally, a cold front will move through on Sunday. This front may drop highs into the upper-60s in San Antonio. Because the front will stall, the forecast on Sunday will be very tricky, with a wide range of temperatures across the area.

Weekend Forecast (Copyright KSAT-12 2025 – All Rights Reserved)Sunday now trending cooler thanks to a cold front (Copyright KSAT-12 2025 – All Rights Reserved)

WARM HOLIDAY WEEK

Despite Sunday’s front, a warm, humid airmass will quickly return by early next week. Warm conditions are still expected for Christmas Eve and Christmas Day.

Extended Forecast (Copyright KSAT-12 2025 – All Rights Reserved)Daily Forecast

KSAT meteorologists keep you on top of the ever-changing South Texas weather.

QUICK WEATHER LINKS

Copyright 2025 by KSAT – All rights reserved.

About the AuthorJustin Horne headshotJustin 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.

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