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

101°F

38°C

Humidity 34%
Wind Speed S 9 G 16 mph
Barometer 30.01 in (1015.1 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index107°F (42°C)
Last update 18 Aug 3:56 pm CDT
Extended Forecast for

Wimberley TX

  • Tonight

    Tonight: Increasing clouds, with a low around 75. South wind around 5 mph.

    Low: 75 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Sunny and hot, with a high near 100. Heat index values as high as 103. Southwest wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74. South wind around 5 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 104. South wind around 5 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. South southeast wind around 5 mph.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. South southwest wind around 5 mph becoming southeast in the afternoon.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Southeast wind around 5 mph becoming calm.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 101. Southwest wind around 5 mph becoming southeast in the afternoon.

    High: 101 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 75. South wind around 5 mph.
Wednesday
Sunny and hot, with a high near 100. Heat index values as high as 103. Southwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 74. South wind around 5 mph, with gusts as high as 20 mph.
Thursday
Mostly cloudy, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 104. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 75. South southeast wind around 5 mph.
Friday
Sunny and hot, with a high near 100. South southwest wind around 5 mph becoming southeast in the afternoon.
Friday Night
Mostly clear, with a low around 77. Southeast wind around 5 mph becoming calm.
Saturday
Sunny and hot, with a high near 101. Southwest wind around 5 mph becoming southeast in the afternoon.
Saturday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm.
Sunday
Sunny and hot, with a high near 101.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny and hot, with a high near 100.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny and hot, with a high near 100.
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ABOUT THIS FORECAST

 
Point Forecast:
Wimberley TX
 29.99°N 98.1°W (Elev. 817 ft)
Last Update:
2:46 pm CDT Aug 18, 2026
Forecast Valid:
4pm CDT Aug 18, 2026-6pm CDT Aug 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation