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.

A Few Clouds

86°F

30°C

Humidity 70%
Wind Speed SW 7 mph
Barometer 30.11 in (1018.8 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 18 Aug 9:56 am CDT
Extended Forecast for

Buda TX

  • Today

    Today: Sunny and hot, with a high near 100. Heat index values as high as 103. South wind around 5 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 77. South wind 5 to 10 mph.

    Low: 77 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 100. South southwest wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 101. South wind around 5 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. South wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Friday

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

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 78. Southeast wind around 5 mph becoming south southwest after midnight.

    Low: 78 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 102. Southwest wind around 5 mph becoming southeast in the afternoon.

    High: 102 °F

    Hot

Detailed Forecast

Today
Sunny and hot, with a high near 100. Heat index values as high as 103. South wind around 5 mph.
Tonight
Partly cloudy, with a low around 77. South wind 5 to 10 mph.
Wednesday
Mostly sunny and hot, with a high near 100. South southwest wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny and hot, with a high near 101. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph.
Friday
Sunny and hot, with a high near 101. South southwest wind around 5 mph becoming southeast in the afternoon.
Friday Night
Partly cloudy, with a low around 78. Southeast wind around 5 mph becoming south southwest after midnight.
Saturday
Mostly sunny and hot, with a high near 102. Southwest wind around 5 mph becoming southeast in the afternoon.
Saturday Night
Mostly clear, with a low around 78.
Sunday
Sunny and hot, with a high near 102.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny and hot, with a high near 100.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Buda TX
 30.06°N 97.84°W (Elev. 735 ft)
Last Update:
6:42 am CDT Aug 18, 2026
Forecast Valid:
10am CDT Aug 18, 2026-6pm CDT Aug 24, 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