December starts with a chill in the air (Copyright KSAT-12 2025 - All Rights Reserved)
FORECAST HIGHLIGHTS
MONDAY: Cloudy, cold, & somewhat damp. Near 50°. Light rain possible
REST OF THE WEEK: Rain and chill return Thursday. Highs in the 50s.
WEEKEND: Sunny! Nice for San Antonio Marathon. 60s
FORECAST
Notice the change? A cold front moved through bringing a sharp cooldown to San Antonio, with temperatures dropping as much as 30 degrees compared to just a day ago
MONDAY
We do not anticipate a widespread freeze, but you’ll want the jacket handy for most of the first week of December. Tomorrow will be the coldest couple of days we’ve had in San Antonio since February.
December starts with a chill in the air (Copyright KSAT-12 2025 - All Rights Reserved)
Expect a gray and cool day with light to moderate rain mainly along the Coastal Plains , (30%) for light rain in San Antonio. Rain totals should stay under half an inch, and any thunder will be isolated.
Rain chances return mainly for the southern to eastern half of the area (Copyright KSAT-12 2025 - All Rights Reserved)
THIS WEEK
Later this week, rain chances climb significantly—Thursday and Friday look to bring widespread showers across the region. Thankfully, early forecasts call for really pleasant weather for the inaugural San Antonio Marathon Sunday.
7 Day Forecast (Copyright KSAT-12 2025 - All Rights Reserved)
Daily Forecast
KSAT meteorologists keep you on top of the ever-changing South Texas weather.
Sarah Spivey is a San Antonio native who grew up watching KSAT. She has been a proud member of the KSAT Weather Authority Team since 2017.
Sarah is a Clark High School and Texas A&M University graduate. She previously worked at KTEN News.
When Sarah is not busy forecasting, she enjoys hanging out with her husband and cat, and playing music.
Shelby Ebertowski joined KSAT 12 News in January 2025. She came to San Antonio from Fargo, North Dakota via the University of North Dakota, where she learned the ropes as a weekend forecaster over two years at KVLY. Her love of weather love began after experiencing Hurricane Harvey in 2017.