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

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

A Few Clouds

94°F

34°C

Humidity 43%
Wind Speed NE 7 mph
Barometer 30.10 in (1017.2 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 17 Sep 3:51 pm CDT
Extended Forecast for

San Antonio TX

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 98. Heat index values as high as 104. East wind around 10 mph.

    High: 98 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, with a low around 77. East wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 98. Heat index values as high as 104. East wind 5 to 10 mph.

    High: 98 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. East wind 5 to 10 mph becoming light south southeast after midnight.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 97. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 97 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 97. South southeast wind around 5 mph.

    High: 97 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 77. Southeast wind around 5 mph.

    Low: 77 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 97. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 97 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 98. Heat index values as high as 104. East wind around 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, with a low around 77. East wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 98. Heat index values as high as 104. East wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 75. East wind 5 to 10 mph becoming light south southeast after midnight.
Saturday
Sunny, with a high near 97. Calm wind becoming east southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 97. South southeast wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 77. Southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 97. Calm wind becoming east southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 76.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 97.
Tuesday Night
Partly cloudy, with a low around 77.
Wednesday
Mostly sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
3:46 pm CDT Sep 17, 2026
Forecast Valid:
3pm CDT Sep 17, 2026-6pm CDT Sep 23, 2026
 
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Additional Resources

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Chance of Precipitation