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

86°F

30°C

Humidity 27%
Wind Speed S 16 mph
Barometer 29.63 in (1002.8 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 25 Feb 4:56 pm CST
Extended Forecast for

3 Miles NNW San Marcos Municipal Airport TX

  • Tonight

    Tonight: Mostly clear, with a low around 57. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Light and variable wind becoming north northeast 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82. East wind around 5 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56. East wind around 5 mph becoming calm.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 85. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. South wind 5 to 10 mph.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 57. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 89. Light and variable wind becoming north northeast 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 57. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 82. East wind around 5 mph.
Friday Night
Mostly clear, with a low around 56. East wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 85. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 56. South wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 59. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 80.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
Mostly cloudy, with a high near 80.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW San Marcos Municipal Airport TX
 29.95°N 97.89°W (Elev. 646 ft)
Last Update:
5:28 pm CST Feb 25, 2026
Forecast Valid:
5pm CST Feb 25, 2026-6pm CST Mar 4, 2026
 
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