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

92°F

33°C

Humidity 44%
Wind Speed Vrbl 7 mph
Barometer 29.89 in (1010.3 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 28 Sep 1:51 pm CDT
Extended Forecast for

San Antonio TX

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 95. Heat index values as high as 100. East southeast wind 5 to 10 mph.

    High: 95 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers between 10am and 4pm. Mostly cloudy, with a high near 94. Heat index values as high as 102. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 94 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 77. Southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 95. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 95 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 77. Southeast wind around 15 mph, with gusts as high as 30 mph.

    Low: 77 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 88. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.

    High: 88 °F

    Showers
    Likely then
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 73. East wind around 5 mph. Chance of precipitation is 90%.

    Low: 73 °F

    Heavy Rain

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 82. Northeast wind around 5 mph. Chance of precipitation is 80%.

    High: 82 °F

    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 95. Heat index values as high as 100. East southeast wind 5 to 10 mph.
Tonight
Mostly cloudy, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
A slight chance of showers between 10am and 4pm. Mostly cloudy, with a high near 94. Heat index values as high as 102. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 77. Southeast wind around 15 mph, with gusts as high as 25 mph.
Wednesday
A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 95. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 77. Southeast wind around 15 mph, with gusts as high as 30 mph.
Thursday
Showers and possibly a thunderstorm. High near 88. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Thursday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 73. East wind around 5 mph. Chance of precipitation is 90%.
Friday
Showers and possibly a thunderstorm. High near 82. Northeast wind around 5 mph. Chance of precipitation is 80%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 71.
Sunday
A 40 percent chance of showers. Mostly cloudy, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
2:46 pm CDT Sep 28, 2026
Forecast Valid:
2pm CDT Sep 28, 2026-6pm CDT Oct 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation