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

81°F

27°C

Humidity 82%
Wind Speed SE 10 mph
Barometer 29.94 in (1012.0 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 5 Sep 1:51 am CDT
Extended Forecast for

Castle Hills TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 77. South southeast wind around 5 mph.

    Low: 77 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 97. Heat index values as high as 102. South southeast wind around 5 mph.

    High: 97 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 77. East southeast wind 5 to 10 mph becoming south after midnight.

    Low: 77 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 97 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 77. East southeast wind 5 to 10 mph.

    Low: 77 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 98. South southeast wind around 5 mph.

    High: 98 °F

    Mostly Sunny

  • Monday Night

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

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 98. Light south southeast wind becoming southeast 5 to 10 mph in the afternoon.

    High: 98 °F

    Sunny

  • Tuesday Night

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

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 77. South southeast wind around 5 mph.
Saturday
Partly sunny, with a high near 97. Heat index values as high as 102. South southeast wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 77. East southeast wind 5 to 10 mph becoming south after midnight.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 77. East southeast wind 5 to 10 mph.
Labor Day
Mostly sunny, with a high near 98. South southeast wind around 5 mph.
Monday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Tuesday
Sunny, with a high near 98. Light south southeast wind becoming southeast 5 to 10 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96.
Wednesday Night
Partly cloudy, with a low around 75.
Thursday
Mostly sunny, with a high near 96.
Thursday Night
Mostly clear, with a low around 76.
Friday
Sunny, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castle Hills TX
 29.53°N 98.53°W (Elev. 846 ft)
Last Update:
2:46 am CDT Sep 5, 2026
Forecast Valid:
2am CDT Sep 5, 2026-6pm CDT Sep 11, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation