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.

Overcast

59°F

15°C

Humidity 64%
Wind Speed N 17 G 29 mph
Barometer 30.06 in (1016.4 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 18 Apr 4:51 pm CDT
Extended Forecast for

Castle Hills TX

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms. Cloudy, with a steady temperature around 63. North northeast wind around 20 mph, with gusts as high as 35 mph.

    High: 63 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 4am, then a slight chance of showers. Cloudy, with a low around 53. North northeast wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Showers
    Likely

  • Sunday

    Sunday: A 10 percent chance of showers before 7am. Mostly cloudy, with a high near 69. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 69 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 55. Northeast wind around 5 mph. Chance of precipitation is 40%.

    Low: 55 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 64. East northeast wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 58. East wind around 5 mph.

    Low: 58 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, with a high near 72. East wind 5 to 10 mph. Chance of precipitation is 60%.

    High: 72 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East southeast wind 5 to 10 mph.

    Low: 65 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. South southeast wind 5 to 10 mph.

    High: 82 °F

    Cloudy then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Cloudy, with a steady temperature around 63. North northeast wind around 20 mph, with gusts as high as 35 mph.
Tonight
Showers and thunderstorms likely before 4am, then a slight chance of showers. Cloudy, with a low around 53. North northeast wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A 10 percent chance of showers before 7am. Mostly cloudy, with a high near 69. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 55. Northeast wind around 5 mph. Chance of precipitation is 40%.
Monday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 64. East northeast wind 5 to 10 mph. Chance of precipitation is 70%.
Monday Night
A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 58. East wind around 5 mph.
Tuesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, with a high near 72. East wind 5 to 10 mph. Chance of precipitation is 60%.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East southeast wind 5 to 10 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. South southeast wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 67.
Thursday
Mostly cloudy, with a high near 84.
Thursday Night
Mostly cloudy, with a low around 69.
Friday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
Friday Night
Mostly cloudy, with a low around 68.
Saturday
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castle Hills TX
 29.53°N 98.53°W (Elev. 846 ft)
Last Update:
2:46 pm CDT Apr 18, 2026
Forecast Valid:
5pm CDT Apr 18, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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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