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.

A Few Clouds

54°F

12°C

Humidity 43%
Wind Speed N 7 mph
Barometer 30.40 in (1029.6 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 4 Feb 6:56 pm CST
Extended Forecast for

5 Miles SW San Marcos TX

  • Tonight

    Tonight: Clear, with a low around 39. North northwest wind 5 to 10 mph.

    Low: 39 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 69. West northwest wind around 5 mph.

    High: 69 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 45. West southwest wind 5 to 10 mph.

    Low: 45 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 79. West wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 47. Calm wind.

    Low: 47 °F

    Clear

  • Saturday

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

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 49. South southwest wind around 5 mph.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 78. South wind 5 to 10 mph.

    High: 78 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 52. South southeast wind around 5 mph.

    Low: 52 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 39. North northwest wind 5 to 10 mph.
Thursday
Sunny, with a high near 69. West northwest wind around 5 mph.
Thursday Night
Clear, with a low around 45. West southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 79. West wind 5 to 10 mph becoming east northeast in the afternoon.
Friday Night
Clear, with a low around 47. Calm wind.
Saturday
Sunny, with a high near 79. Calm wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 49. South southwest wind around 5 mph.
Sunday
Partly sunny, with a high near 78. South wind 5 to 10 mph.
Sunday Night
Mostly cloudy, with a low around 52. South southeast wind around 5 mph.
Monday
Mostly cloudy, with a high near 77.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 56.
Tuesday
A 20 percent chance of showers. Mostly cloudy, with a high near 76.
Tuesday Night
Mostly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 78.
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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:
7:01 pm CST Feb 4, 2026
Forecast Valid:
7pm CST Feb 4, 2026-6pm CST Feb 11, 2026
 
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Additional Resources

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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