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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

5 Miles SW San Marcos TX

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 71. North northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 71 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 55. Northeast wind around 5 mph becoming calm after midnight.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 83. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 83 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 62. South wind 5 to 10 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Monday

    Monday: Partly sunny, with a high near 88. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 88 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 90. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 90 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 66. South southeast wind 10 to 20 mph, with gusts as high as 25 mph.

    Low: 66 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 90. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 90 °F

    Cloudy then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Partly sunny, with a high near 71. North northeast wind around 10 mph, with gusts as high as 20 mph.
Tonight
Partly cloudy, with a low around 55. Northeast wind around 5 mph becoming calm after midnight.
Sunday
Mostly sunny, with a high near 83. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Increasing clouds, with a low around 62. South wind 5 to 10 mph.
Monday
Partly sunny, with a high near 88. South wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 64. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
Partly sunny, with a high near 90. South wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 66. South southeast wind 10 to 20 mph, with gusts as high as 25 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 90. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 64.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Friday
Mostly cloudy, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.81°N 97.99°W (Elev. 653 ft)
Last Update:
1:32 pm CDT Mar 28, 2026
Forecast Valid:
1pm CDT Mar 28, 2026-6pm CDT Apr 3, 2026
 
Forecast Discussion
 
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Additional Resources

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