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.

Fair

42°F

6°C

Humidity 55%
Wind Speed Calm
Barometer 30.21 in (1022.8 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 6 Feb 5:56 am CST
Extended Forecast for

5 Miles SW San Marcos TX

  • Today

    Today: Sunny, with a high near 81. West wind 5 to 10 mph becoming north northeast in the afternoon.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 48. Calm wind becoming north northwest around 5 mph after midnight.

    Low: 48 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 79. North wind around 5 mph becoming southeast in the afternoon.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50. Southeast wind around 5 mph becoming calm after midnight.

    Low: 50 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 76. Calm wind becoming south around 5 mph in the morning.

    High: 76 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 54. South southeast wind around 5 mph.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 76. South wind 5 to 10 mph.

    High: 76 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 58. South southeast wind 5 to 10 mph.

    Low: 58 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers. Partly sunny, with a high near 76. South wind 5 to 10 mph.

    High: 76 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 81. West wind 5 to 10 mph becoming north northeast in the afternoon.
Tonight
Clear, with a low around 48. Calm wind becoming north northwest around 5 mph after midnight.
Saturday
Sunny, with a high near 79. North wind around 5 mph becoming southeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 50. Southeast wind around 5 mph becoming calm after midnight.
Sunday
Partly sunny, with a high near 76. Calm wind becoming south around 5 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 54. South southeast wind around 5 mph.
Monday
Mostly cloudy, with a high near 76. South wind 5 to 10 mph.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 58. South southeast wind 5 to 10 mph.
Tuesday
A 50 percent chance of showers. Partly sunny, with a high near 76. South wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.81°N 97.99°W (Elev. 653 ft)
Last Update:
5:43 am CST Feb 6, 2026
Forecast Valid:
6am CST Feb 6, 2026-6pm CST Feb 12, 2026
 
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