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

39°F

4°C

Humidity 62%
Wind Speed Calm
Barometer 30.21 in (1022.9 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 6 Feb 6:56 am CST
Extended Forecast for

3 Miles NNW Luling TX

  • Today

    Today: Sunny, with a high near 81. West wind around 5 mph becoming calm in the afternoon.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80. North wind around 5 mph becoming southeast in the afternoon.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 48. Southeast wind around 5 mph becoming calm after midnight.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.

    High: 77 °F

    Partly Sunny

  • Sunday Night

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

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 78. Light south wind increasing to 5 to 10 mph in the morning.

    High: 78 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 57. South wind 5 to 10 mph.

    Low: 57 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers. Partly sunny, with a high near 78. South wind 5 to 10 mph.

    High: 78 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 81. West wind around 5 mph becoming calm in the afternoon.
Tonight
Mostly clear, with a low around 45. Calm wind.
Saturday
Sunny, with a high near 80. North wind around 5 mph becoming southeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 48. Southeast wind around 5 mph becoming calm after midnight.
Sunday
Partly sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 54. South southeast wind around 5 mph becoming calm after midnight.
Monday
Partly sunny, with a high near 78. Light south wind increasing to 5 to 10 mph in the morning.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 57. South wind 5 to 10 mph.
Tuesday
A 50 percent chance of showers. Partly sunny, with a high near 78. South wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Partly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Luling TX
 29.73°N 97.65°W (Elev. 446 ft)
Last Update:
6:55 am CST Feb 6, 2026
Forecast Valid:
7am 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