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

70°F

21°C

Humidity 93%
Wind Speed Calm
Barometer 29.97 in (1014.0 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 20 Sep 6:56 am CDT
Extended Forecast for

Wimberley TX

  • Today

    Today: Mostly sunny, with a high near 97. Heat index values as high as 104. Calm wind becoming south southwest around 5 mph in the morning.

    High: 97 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 74. South southeast wind around 5 mph becoming calm.

    Low: 74 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming southeast around 5 mph.

    High: 97 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 73. East southeast wind around 5 mph becoming calm.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 97. Calm wind becoming east around 5 mph in the afternoon.

    High: 97 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 74. East wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 97. Calm wind becoming east around 5 mph in the morning.

    High: 97 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 73. East wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 96. Calm wind becoming east around 5 mph in the morning.

    High: 96 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 97. Heat index values as high as 104. Calm wind becoming south southwest around 5 mph in the morning.
Tonight
Partly cloudy, with a low around 74. South southeast wind around 5 mph becoming calm.
Monday
Mostly sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming southeast around 5 mph.
Monday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 73. East southeast wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 97. Calm wind becoming east around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 74. East wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 97. Calm wind becoming east around 5 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 73. East wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 96. Calm wind becoming east around 5 mph in the morning.
Thursday Night
Partly cloudy, with a low around 71.
Friday
Mostly sunny, with a high near 95.
Friday Night
Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Wimberley TX
 30.01°N 98.1°W (Elev. 863 ft)
Last Update:
6:46 am CDT Sep 20, 2026
Forecast Valid:
7am CDT Sep 20, 2026-6pm CDT Sep 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation