National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

79°F

26°C

Humidity 82%
Wind Speed S 8 mph
Barometer 30.06 in (1017.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 25 Aug 8:56 am CDT
Extended Forecast for

Kyle TX

Heat Advisory August 25, 09:12am until August 26, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 25, 09:12am until August 26, 07:00pm

    NOW until 7:00pm Wed

    Heat Advisory

  • Today

    High: 103 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 102. Heat index values as high as 105. Southwest wind around 5 mph.

    High: 102 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 76. South wind around 5 mph.

    Low: 76 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 101. Southwest wind around 5 mph becoming southeast in the afternoon.

    High: 101 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. East southeast wind around 5 mph becoming calm in the evening.

    Low: 76 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. Southwest wind around 5 mph becoming east in the afternoon.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 75. East southeast wind around 5 mph becoming calm after midnight.

    Low: 75 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny and hot, with a high near 103. South wind around 5 mph.
Tonight
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny and hot, with a high near 102. Heat index values as high as 105. Southwest wind around 5 mph.
Wednesday Night
Partly cloudy, with a low around 76. South wind around 5 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 101. Southwest wind around 5 mph becoming southeast in the afternoon.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. East southeast wind around 5 mph becoming calm in the evening.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. Southwest wind around 5 mph becoming east in the afternoon.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 75. East southeast wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny, with a high near 97.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Kyle TX
 30°N 97.86°W (Elev. 699 ft)
Last Update:
6:42 am CDT Aug 25, 2026
Forecast Valid:
9am CDT Aug 25, 2026-6pm CDT Aug 31, 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