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

55°F

13°C

Humidity 38%
Wind Speed W 3 mph
Barometer 30.22 in (1023.1 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 6 Feb 8:56 am CST
Extended Forecast for

2 Miles SW San Marcos Municipal Airport TX

  • Today

    Today: Sunny, with a high near 81. West northwest wind 5 to 10 mph becoming light and variable in the afternoon.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 46. Calm wind becoming north northwest around 5 mph.

    Low: 46 °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 48. Southeast wind around 5 mph becoming calm in the evening.

    Low: 48 °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 wind around 5 mph becoming calm after midnight.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 77. Light south southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 77 °F

    Partly Sunny

  • Monday Night

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

    Low: 57 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers. Partly sunny, with a high near 77. South wind 5 to 10 mph.

    High: 77 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 81. West northwest wind 5 to 10 mph becoming light and variable in the afternoon.
Tonight
Clear, with a low around 46. Calm wind becoming north 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 48. Southeast wind around 5 mph becoming calm in the evening.
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 wind around 5 mph becoming calm after midnight.
Monday
Partly sunny, with a high near 77. Light south southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 57. South southeast wind around 5 mph.
Tuesday
A 50 percent chance of showers. Partly sunny, with a high near 77. South wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Partly sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW San Marcos Municipal Airport TX
 29.88°N 97.89°W (Elev. 597 ft)
Last Update:
7:42 am CST Feb 6, 2026
Forecast Valid:
9am CST Feb 6, 2026-6pm CST Feb 12, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation