Tracking Areas of Winter Weather and Heavy Rainfall

A cold front will move through the Great Lakes and Northeast U.S. today, bringing areas of snow and snow squalls which can bring rapid reductions to visibility and slick roads. A storm system will shift from the northern Gulf Coast through the Southeast U.S. today through Friday with areas of heavy to excessive rainfall and light snow further north. Heavy snow is also expected in the Rockies. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fog/Mist

49°F

9°C

Humidity 86%
Wind Speed N 18 mph
Barometer 30.16 in (1021.1 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 4 Dec 12:56 pm CST
Extended Forecast for

San Marcos TX

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 54. North wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 54 °F

    Mostly Cloudy

  • Tonight

    Tonight: Cloudy, with a low around 42. North wind 5 to 10 mph, with gusts as high as 25 mph.

    Low: 42 °F

    Cloudy

  • Friday

    Friday: A chance of showers between 9am and 3pm.  Cloudy, with a high near 52. North wind around 5 mph becoming calm  in the morning.  Chance of precipitation is 30%.

    High: 52 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 44. South wind around 5 mph becoming calm.

    Low: 44 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72. West southwest wind around 5 mph.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 50. South wind around 5 mph becoming west after midnight.

    Low: 50 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 70. West wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 70 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 61. North wind 5 to 10 mph becoming east in the afternoon.

    High: 61 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 54. North wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Cloudy, with a low around 42. North wind 5 to 10 mph, with gusts as high as 25 mph.
Friday
A chance of showers between 9am and 3pm. Cloudy, with a high near 52. North wind around 5 mph becoming calm in the morning. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 44. South wind around 5 mph becoming calm.
Saturday
Mostly sunny, with a high near 72. West southwest wind around 5 mph.
Saturday Night
Mostly clear, with a low around 50. South wind around 5 mph becoming west after midnight.
Sunday
Sunny, with a high near 70. West wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Mostly clear, with a low around 39. North wind around 10 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 61. North wind 5 to 10 mph becoming east in the afternoon.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
12:54 pm CST Dec 4, 2025
1pm CST Dec 4, 2025-6pm CST Dec 10, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database