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

94°F

34°C

Humidity 33%
Wind Speed S 15 mph
Barometer 29.93 in (1012.8 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 13 Sep 5:56 pm CDT
Extended Forecast for

4 Miles SSW San Marcos TX

  • Tonight

    Tonight: Partly cloudy, with a low around 70. South southeast wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 94. Light and variable wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 94 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 70. Southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 70 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 94. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67. East southeast wind around 5 mph becoming calm after midnight.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70. East southeast wind around 5 mph becoming calm after midnight.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the morning.

    High: 93 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69. South southeast wind around 5 mph becoming calm after midnight.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 70. South southeast wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Sunday
Mostly sunny, with a high near 94. Light and variable wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 70. Southeast wind 5 to 10 mph becoming light south after midnight.
Monday
Sunny, with a high near 94. Calm wind becoming east southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 67. East southeast wind around 5 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 94. Calm wind becoming east southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 70. East southeast wind around 5 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the morning.
Wednesday Night
Mostly clear, with a low around 69. South southeast wind around 5 mph becoming calm after midnight.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 69.
Friday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.
Friday Night
Mostly clear, with a low around 70.
Saturday
Sunny, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW San Marcos TX
 29.81°N 97.96°W (Elev. 676 ft)
Last Update:
6:02 pm CDT Sep 13, 2025
Forecast Valid:
6pm CDT Sep 13, 2025-6pm CDT Sep 20, 2025
 
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Additional Resources

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