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

73°F

23°C

Humidity 48%
Wind Speed N 10 mph
Barometer 30.02 in (1016.1 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 15 Feb 4:56 pm CST
Extended Forecast for

2 Miles W San Marcos Municipal Airport TX

  • Tonight

    Tonight: Mostly clear, with a low around 46. North wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 78. Calm wind becoming south around 5 mph in the afternoon.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 53. South southeast wind around 5 mph.

    Low: 53 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 83. Calm wind becoming south southwest around 5 mph in the morning.

    High: 83 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 61. South southeast wind around 5 mph.

    Low: 61 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 84. South southwest wind around 5 mph.

    High: 84 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 61. South wind around 5 mph.

    Low: 61 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 46. North wind around 5 mph becoming calm in the evening.
Washington's Birthday
Sunny, with a high near 78. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 53. South southeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 83. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 59. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 83. Calm wind becoming south southwest around 5 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 61. South southeast wind around 5 mph.
Thursday
Mostly cloudy, with a high near 84. South southwest wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 61. South wind around 5 mph.
Friday
Partly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
A 20 percent chance of showers. Sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W San Marcos Municipal Airport TX
 29.9°N 97.91°W (Elev. 640 ft)
Last Update:
4:32 pm CST Feb 15, 2026
Forecast Valid:
5pm CST Feb 15, 2026-6pm CST Feb 22, 2026
 
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Additional Resources

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