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

Hazardous Weather Conditions

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

A Few Clouds

93°F

34°C

Humidity 36%
Wind Speed SE 9 mph
Barometer 29.95 in (1012.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 25 Aug 8:51 pm CDT
Extended Forecast for

3 Miles NNW Leon Valley TX

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

    NOW until 7:00pm Wed

    Heat Advisory

  • Tonight

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 102. Heat index values as high as 105. West southwest wind around 5 mph becoming east southeast in the afternoon.

    High: 102 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 78. South southeast 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 105. Calm wind becoming east around 5 mph in the afternoon.

    High: 100 °F

    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 78. East wind around 5 mph becoming calm in the evening.

    Low: 78 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

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

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. East wind around 5 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

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

    High: 99 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 76. 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. West southwest wind around 5 mph becoming east southeast in the afternoon.
Wednesday Night
Mostly clear, with a low around 78. South southeast 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 105. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 78. East wind around 5 mph becoming calm in the evening.
Friday
Sunny and hot, with a high near 100. Calm wind becoming east around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 77. East wind around 5 mph.
Saturday
Sunny and hot, with a high near 99. Calm wind becoming east southeast around 5 mph in the afternoon.
Saturday Night
Clear, with a low around 76. South southeast wind around 5 mph.
Sunday
Sunny and hot, with a high near 99.
Sunday Night
Clear, with a low around 75.
Monday
Sunny and hot, with a high near 99.
Monday Night
Clear, with a low around 76.
Tuesday
Sunny and hot, with a high near 99.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Leon Valley TX
 29.52°N 98.64°W (Elev. 850 ft)
Last Update:
7:42 pm CDT Aug 25, 2026
Forecast Valid:
9pm CDT Aug 25, 2026-6pm CDT Sep 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation