Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Fair

78°F

26°C

Humidity 85%
Wind Speed SW 5 mph
Barometer 30.08 in (1016.6 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 18 Aug 6:51 am CDT
Extended Forecast for

Castle Hills TX

  • Today

    Today: Mostly sunny and hot, with a high near 100. Calm wind becoming south around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 77. South southeast wind 5 to 10 mph.

    Low: 77 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 100. South southwest wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 77. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 100. South wind around 5 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and hot, with a high near 100. South wind around 5 mph.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 79. Southeast wind around 5 mph.

    Low: 79 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 101. South southwest wind around 5 mph becoming southeast in the afternoon.

    High: 101 °F

    Hot

Detailed Forecast

Today
Mostly sunny and hot, with a high near 100. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 77. South southeast wind 5 to 10 mph.
Wednesday
Mostly sunny and hot, with a high near 100. South southwest wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 77. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny and hot, with a high near 100. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 79. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny and hot, with a high near 100. South wind around 5 mph.
Friday Night
Mostly clear, with a low around 79. Southeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 101. South southwest wind around 5 mph becoming southeast in the afternoon.
Saturday Night
Mostly clear, with a low around 79.
Sunday
Sunny and hot, with a high near 100.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny and hot, with a high near 99.
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ABOUT THIS FORECAST

 
Point Forecast:
Castle Hills TX
 29.53°N 98.51°W (Elev. 869 ft)
6:42 am CDT Aug 18, 2026
7am CDT Aug 18, 2026-6pm CDT Aug 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database