National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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.

Light Rain

48°F

9°C

Humidity 93%
Wind Speed N 18 G 24 mph
Barometer 30.15 in (1020.7 mb)
Dewpoint 46°F (8°C)
Visibility 7.00 mi
Wind Chill41°F (5°C)
Last update 4 Dec 8:56 am CST
Extended Forecast for

San Marcos TX

  • Today

    Today: A chance of drizzle, mainly before noon. Cloudy, with a high near 55. North wind around 15 mph, with gusts as high as 30 mph.

    High: 55 °F

    Chance
    Drizzle

  • Tonight

    Tonight: A 30 percent chance of showers after 3am. Cloudy, with a low around 41. North wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 41 °F

    Cloudy then
    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers, mainly before noon. Cloudy, with a high near 52. North wind around 5 mph becoming south southeast in the afternoon.

    High: 52 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45. South wind around 5 mph becoming west southwest after midnight.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72. Southwest wind 5 to 10 mph.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51. South southwest wind around 5 mph becoming west northwest after midnight.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 70. West northwest wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 70 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38. North wind around 10 mph.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 62. North wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 62 °F

    Sunny

Detailed Forecast

Today
A chance of drizzle, mainly before noon. Cloudy, with a high near 55. North wind around 15 mph, with gusts as high as 30 mph.
Tonight
A 30 percent chance of showers after 3am. Cloudy, with a low around 41. North wind 5 to 15 mph, with gusts as high as 25 mph.
Friday
A 30 percent chance of showers, mainly before noon. Cloudy, with a high near 52. North wind around 5 mph becoming south southeast in the afternoon.
Friday Night
Mostly cloudy, with a low around 45. South wind around 5 mph becoming west southwest after midnight.
Saturday
Mostly sunny, with a high near 72. Southwest wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 51. South southwest wind around 5 mph becoming west northwest after midnight.
Sunday
Sunny, with a high near 70. West northwest wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 38. North wind around 10 mph.
Monday
Sunny, with a high near 62. North wind 5 to 10 mph becoming east southeast in the afternoon.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Sunny, with a high near 68.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.91°W (Elev. 597 ft)
Last Update:
8:42 am CST Dec 4, 2025
Forecast Valid:
9am CST Dec 4, 2025-6pm CST Dec 10, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation