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.

Mostly Cloudy

91°F

33°C

Humidity 50%
Wind Speed Vrbl 5 mph
Barometer 29.95 in (1012.2 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 5 Sep 12:51 pm CDT
Extended Forecast for

San Antonio International Airport TX

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 96. Heat index values as high as 104. Southeast wind around 5 mph.

    High: 96 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 77. East southeast wind around 5 mph becoming calm after midnight.

    Low: 77 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 102. Calm wind becoming east around 5 mph in the afternoon.

    High: 97 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 4am. Partly cloudy, with a low around 77. East wind around 5 mph becoming calm in the evening.

    Low: 77 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Labor Day

    Labor Day: A 10 percent chance of showers before 7am. Sunny, with a high near 98. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 98 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. South southeast wind around 5 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

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

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. Southeast wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

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

    High: 97 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 96. Heat index values as high as 104. Southeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 77. East southeast wind around 5 mph becoming calm after midnight.
Sunday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 102. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
A 20 percent chance of showers after 4am. Partly cloudy, with a low around 77. East wind around 5 mph becoming calm in the evening.
Labor Day
A 10 percent chance of showers before 7am. Sunny, with a high near 98. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 77. South southeast wind around 5 mph.
Tuesday
Sunny and hot, with a high near 99. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 76. Southeast wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 76.
Thursday
Mostly sunny, with a high near 98.
Thursday Night
Partly cloudy, with a low around 77.
Friday
Sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio International Airport TX
 29.53°N 98.45°W (Elev. 771 ft)
Last Update:
1:24 pm CDT Sep 5, 2026
Forecast Valid:
1pm CDT Sep 5, 2026-6pm CDT Sep 11, 2026
 
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Additional Resources

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Chance of Precipitation