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

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

41°F

5°C

Humidity 33%
Wind Speed NE 5 mph
Barometer 30.44 in (1031.2 mb)
Dewpoint 14°F (-10°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 23 Jan 6:56 pm CST
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: Clear, with a low around 26. North northeast wind around 5 mph becoming northwest after midnight.

    Low: 26 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 57. Light and variable wind becoming south southwest 5 to 10 mph in the afternoon.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 33. South wind 5 to 10 mph.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 57. South southwest wind around 5 mph becoming east southeast in the afternoon.

    High: 57 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 3am. Cloudy, with a low around 51. East southeast wind around 5 mph becoming north northeast after midnight. Chance of precipitation is 50%.

    Low: 51 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms before 3pm, then a slight chance of showers. Cloudy, with a high near 59. North wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    High: 59 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Cloudy, with a low around 47. North wind 5 to 10 mph.

    Low: 47 °F

    Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 57. North northeast wind 5 to 10 mph.

    High: 57 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 49. Northeast wind around 5 mph becoming calm in the evening.

    Low: 49 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 26. North northeast wind around 5 mph becoming northwest after midnight.
Friday
Sunny, with a high near 57. Light and variable wind becoming south southwest 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 33. South wind 5 to 10 mph.
Saturday
Increasing clouds, with a high near 57. South southwest wind around 5 mph becoming east southeast in the afternoon.
Saturday Night
A chance of showers, with thunderstorms also possible after 3am. Cloudy, with a low around 51. East southeast wind around 5 mph becoming north northeast after midnight. Chance of precipitation is 50%.
Sunday
A chance of showers and thunderstorms before 3pm, then a slight chance of showers. Cloudy, with a high near 59. North wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Sunday Night
Cloudy, with a low around 47. North wind 5 to 10 mph.
Monday
Mostly cloudy, with a high near 57. North northeast wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 49. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers before noon. Cloudy, with a high near 66.
Tuesday Night
A 30 percent chance of showers. Cloudy, with a low around 55.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 68.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 63.
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Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
5:42 pm CST Jan 23, 2025
Forecast Valid:
7pm CST Jan 23, 2025-6pm CST Jan 30, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation