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

74°F

23°C

Humidity 91%
Wind Speed Calm
Barometer 30.09 in (1018.2 mb)
Dewpoint 71°F (22°C)
Visibility 8.00 mi
Last update 25 Sep 7:56 am CDT
Extended Forecast for

Wimberley TX

  • Today

    Today: Mostly sunny, with a high near 96. Heat index values as high as 100. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 96 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 71. East wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 95. Heat index values as high as 100. Calm wind becoming south around 5 mph.

    High: 95 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 97. Calm wind becoming south southwest around 5 mph.

    High: 97 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73. Southeast wind around 5 mph becoming calm.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 96. Calm wind becoming south southeast around 5 mph in the morning.

    High: 96 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 95. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 95 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 96. Heat index values as high as 100. Calm wind becoming southeast around 5 mph in the afternoon.
Tonight
Increasing clouds, with a low around 71. East wind around 5 mph becoming calm in the evening.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 95. Heat index values as high as 100. Calm wind becoming south around 5 mph.
Saturday Night
Partly cloudy, with a low around 71. Calm wind.
Sunday
Sunny, with a high near 97. Calm wind becoming south southwest around 5 mph.
Sunday Night
Partly cloudy, with a low around 73. Southeast wind around 5 mph becoming calm.
Monday
Mostly sunny, with a high near 96. Calm wind becoming south southeast around 5 mph in the morning.
Monday Night
Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 95. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 90.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Thursday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Wimberley TX
 29.99°N 98.1°W (Elev. 817 ft)
Last Update:
6:42 am CDT Sep 25, 2026
Forecast Valid:
8am CDT Sep 25, 2026-6pm CDT Oct 1, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation