National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Mostly Cloudy

80°F

27°C

Humidity 82%
Wind Speed S 12 G 21 mph
Barometer 30.05 in (1015.8 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 15 Jul 1:51 am CDT
Extended Forecast for

Castle Hills TX

Flood Watch July 15, 02:11am until July 15, 01:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch July 15, 02:11am until July 15, 01:00pm

    NOW until 1:00pm Tue

    Flood Watch

  • Overnight

    Low: 76 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 94. Heat index values as high as 102. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 94 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday Night

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

    Low: 76 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 96. Heat index values as high as 102. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 96 °F

    Gradual
    Clearing

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 96. South southeast wind around 5 mph.

    High: 96 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 74. South southeast wind around 5 mph.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 95. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 95 °F

    Mostly Sunny

Detailed Forecast

Overnight
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 76. South southeast wind around 5 mph. Chance of precipitation is 20%.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 94. Heat index values as high as 102. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Increasing clouds, with a low around 76. South southeast wind 5 to 10 mph.
Wednesday
Cloudy through mid morning, then gradual clearing, with a high near 96. Heat index values as high as 102. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 96. South southeast wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 74. South southeast wind around 5 mph.
Friday
Mostly sunny, with a high near 95. Calm wind becoming south southeast around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 75. East southeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 97.
Saturday Night
Partly cloudy, with a low around 76.
Sunday
Mostly sunny, with a high near 98.
Sunday Night
Partly cloudy, with a low around 76.
Monday
Mostly sunny, with a high near 98.
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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:
1:42 am CDT Jul 15, 2025
Forecast Valid:
2am CDT Jul 15, 2025-6pm CDT Jul 21, 2025
 
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