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

91°F

33°C

Humidity 50%
Wind Speed SE 15 mph
Barometer 30.00 in (1015.0 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 25 Aug 9:56 pm CDT
Extended Forecast for

Kyle TX

Heat Advisory August 25, 10:26pm until August 26, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 25, 10:26pm until August 26, 07:00pm

    NOW until 7:00pm Wed

    Heat Advisory

  • Tonight

    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: Mostly clear, with a low around 78. South wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 100. Heat index values as high as 106. Southwest wind around 5 mph becoming calm in the morning.

    High: 100 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 77. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 77 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Sunny and hot, with a high near 100. West wind around 5 mph becoming east northeast in the afternoon.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. East northeast wind around 5 mph becoming calm after midnight.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 99 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 75. South southwest 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
Mostly clear, with a low around 78. South wind around 5 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 100. Heat index values as high as 106. Southwest wind around 5 mph becoming calm in the morning.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 77. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Friday
Sunny and hot, with a high near 100. West wind around 5 mph becoming east northeast in the afternoon.
Friday Night
Mostly clear, with a low around 75. East northeast wind around 5 mph becoming calm after midnight.
Saturday
Sunny and hot, with a high near 99. Calm wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 75. East southeast wind around 5 mph becoming south after midnight.
Sunday
Sunny and hot, with a high near 99.
Sunday Night
Clear, with a low around 75.
Monday
Sunny, with a high near 98.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Mostly sunny, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Kyle TX
 29.99°N 97.89°W (Elev. 791 ft)
Last Update:
7:42 pm CDT Aug 25, 2026
Forecast Valid:
10pm CDT Aug 25, 2026-6pm CDT Sep 1, 2026
 
Forecast Discussion
 
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Additional Resources

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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