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

79°F

26°C

Humidity 85%
Wind Speed S 6 mph
Barometer 29.88 in (1009.7 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 22 Sep 4:51 am CDT
Extended Forecast for

Castle Hills TX

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 95. Heat index values as high as 101. South wind 5 to 10 mph.

    High: 95 °F

    Decreasing
    Clouds

  • Tonight

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

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 97. Heat index values as high as 103. South wind 5 to 10 mph.

    High: 97 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 94. South wind around 5 mph becoming north in the afternoon. Chance of precipitation is 60%.

    High: 94 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. North northeast wind around 5 mph.

    Low: 71 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 89. North northeast wind around 5 mph. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68. North northeast wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 91. North northeast wind around 5 mph becoming southeast in the afternoon.

    High: 91 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 95. Heat index values as high as 101. South wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 76. Southeast wind 5 to 10 mph.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 97. Heat index values as high as 103. South wind 5 to 10 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 94. South wind around 5 mph becoming north in the afternoon. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. North northeast wind around 5 mph.
Thursday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 89. North northeast wind around 5 mph. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 68. North northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 91. North northeast wind around 5 mph becoming southeast in the afternoon.
Friday Night
Mostly clear, with a low around 68.
Saturday
Sunny, with a high near 93.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castle Hills TX
 29.53°N 98.51°W (Elev. 869 ft)
Last Update:
5:32 am CDT Sep 22, 2025
Forecast Valid:
5am CDT Sep 22, 2025-6pm CDT Sep 28, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation