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

85°F

29°C

Humidity 50%
Wind Speed SE 17 G 24 mph
Barometer 29.81 in (1008.5 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 16 May 6:56 pm CDT
Extended Forecast for

5 Miles SSE Wimberley TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 74. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 74 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 89. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 89 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 77. South southeast wind around 15 mph, with gusts as high as 30 mph.

    Low: 77 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 90. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 90 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 77. South southeast wind around 15 mph, with gusts as high as 30 mph.

    Low: 77 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 90. South southeast wind around 15 mph, with gusts as high as 25 mph.

    High: 90 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 73. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 73 °F

    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 85. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 85 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. East southeast wind 5 to 10 mph.

    Low: 71 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, with a low around 74. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Mostly cloudy, with a high near 89. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 77. South southeast wind around 15 mph, with gusts as high as 30 mph.
Monday
Mostly cloudy, with a high near 90. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 77. South southeast wind around 15 mph, with gusts as high as 30 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 90. South southeast wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 73. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 85. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. East southeast wind 5 to 10 mph.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Wimberley TX
 29.92°N 98.07°W (Elev. 1047 ft)
Last Update:
6:44 pm CDT May 16, 2026
Forecast Valid:
7pm CDT May 16, 2026-6pm CDT May 23, 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