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 70%
Wind Speed Vrbl 3 mph
Barometer 30.04 in (1016.2 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 1 Sep 9:56 am CDT
Extended Forecast for

Wimberley TX

  • Today

    Today: A slight chance of showers and thunderstorms between 1pm and 4pm. Increasing clouds, with a high near 97. Heat index values as high as 103. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 97 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 75. East wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms between 1pm and 4pm. Mostly sunny, with a high near 98. Heat index values as high as 104. Calm wind becoming southwest around 5 mph. Chance of precipitation is 20%.

    High: 98 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms between 7pm and 10pm, then a slight chance of showers after 10pm. Partly cloudy, with a low around 75. Southeast wind around 5 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. South wind around 5 mph.

    High: 96 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 74 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 95. South wind around 5 mph.

    High: 95 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm after midnight.

    Low: 74 °F

    Mostly Clear

  • Saturday

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

    High: 96 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 1pm and 4pm. Increasing clouds, with a high near 97. Heat index values as high as 103. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 75. East wind around 5 mph becoming calm in the evening.
Wednesday
A slight chance of showers and thunderstorms between 1pm and 4pm. Mostly sunny, with a high near 98. Heat index values as high as 104. Calm wind becoming southwest around 5 mph. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers and thunderstorms between 7pm and 10pm, then a slight chance of showers after 10pm. Partly cloudy, with a low around 75. Southeast wind around 5 mph. Chance of precipitation is 20%.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. South wind around 5 mph.
Thursday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 95. South wind around 5 mph.
Friday Night
Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm after midnight.
Saturday
Mostly sunny, with a high near 96. Calm wind becoming south around 5 mph in the morning.
Saturday Night
Mostly clear, with a low around 74.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Sunday Night
Partly cloudy, with a low around 74.
Labor Day
Sunny, with a high near 96.
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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 1, 2026
Forecast Valid:
10am CDT Sep 1, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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