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.

Partly Cloudy

81°F

27°C

Humidity 77%
Wind Speed S 7 mph
Barometer 29.93 in (1011.4 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 7 Sep 2:51 am CDT
Extended Forecast for

San Antonio TX

  • Overnight

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

    Low: 78 °F

    Mostly Clear

  • Labor Day

    Labor Day: A slight chance of showers and thunderstorms between 1pm and 4pm. Sunny and hot, with a high near 99. Heat index values as high as 103. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

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

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 102. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 98 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 78. Southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Calm wind becoming south around 5 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. Southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Labor Day
A slight chance of showers and thunderstorms between 1pm and 4pm. Sunny and hot, with a high near 99. Heat index values as high as 103. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 102. Calm wind becoming south southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.
Wednesday
Sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 78. Southeast wind around 5 mph.
Thursday
Sunny and hot, with a high near 99. Calm wind becoming south around 5 mph.
Thursday Night
Mostly clear, with a low around 78. Southeast wind around 5 mph.
Friday
Sunny and hot, with a high near 100.
Friday Night
Mostly clear, with a low around 78.
Saturday
Sunny and hot, with a high near 100.
Saturday Night
Mostly clear, with a low around 78.
Sunday
Sunny and hot, with a high near 99.
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
2:44 am CDT Sep 7, 2026
Forecast Valid:
3am CDT Sep 7, 2026-6pm CDT Sep 13, 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