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

89°F

32°C

Humidity 52%
Wind Speed SE 7 mph
Barometer 30.19 in (1020.5 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 16 Sep 11:51 am CDT
Extended Forecast for

San Antonio TX

  • This Afternoon

    This Afternoon: Mostly sunny and hot, with a high near 99. Heat index values as high as 103. East southeast wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms between 1pm and 4pm. Partly sunny, with a high near 97. Heat index values as high as 107. East wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 97 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 77. East southeast wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 97. East southeast wind around 5 mph.

    High: 97 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. East southeast 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 southeast around 5 mph in the afternoon.

    High: 97 °F

    Sunny

  • Saturday Night

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

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 98 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny and hot, with a high near 99. Heat index values as high as 103. East southeast wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 78. Southeast wind 5 to 10 mph.
Thursday
A slight chance of showers and thunderstorms between 1pm and 4pm. Partly sunny, with a high near 97. Heat index values as high as 107. East wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 77. East southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 97. East southeast wind around 5 mph.
Friday Night
Mostly clear, with a low around 75. East southeast wind 5 to 10 mph becoming light south southeast after midnight.
Saturday
Sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 76. Southeast wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 77.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 97.
Monday Night
A 20 percent chance of showers. Mostly clear, with a low around 76.
Tuesday
Mostly sunny, with a high near 96.
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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:
11:32 am CDT Sep 16, 2026
Forecast Valid:
12pm CDT Sep 16, 2026-6pm CDT Sep 22, 2026
 
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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