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

78°F

26°C

Humidity 16%
Wind Speed S 6 mph
Barometer 30.13 in (1019.9 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 6 Feb 5:56 pm CST
Extended Forecast for

4 Miles NNW San Marcos Municipal Airport TX

  • Tonight

    Tonight: Clear, with a low around 47. Calm wind becoming west northwest around 5 mph.

    Low: 47 °F

    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 49. Southeast wind around 5 mph becoming calm after midnight.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 76. Light south southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 76 °F

    Partly Sunny

  • Sunday Night

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

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 76. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 76 °F

    Mostly Cloudy

  • Monday Night

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

    Low: 57 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers. Mostly cloudy, with a high near 77. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 77 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54. South wind around 5 mph.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 47. Calm wind becoming west northwest around 5 mph.
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 49. Southeast wind around 5 mph becoming calm after midnight.
Sunday
Partly sunny, with a high near 76. Light south southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 54. South wind around 5 mph.
Monday
Mostly cloudy, with a high near 76. South wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 57. South wind around 5 mph.
Tuesday
A 40 percent chance of showers. Mostly cloudy, with a high near 77. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 54. South wind around 5 mph.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 55.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW San Marcos Municipal Airport TX
 29.95°N 97.89°W (Elev. 646 ft)
Last Update:
6:46 pm CST Feb 6, 2026
Forecast Valid:
6pm CST Feb 6, 2026-6pm CST Feb 13, 2026
 
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Additional Resources

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Chance of Precipitation