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

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Overcast

67°F

19°C

Humidity 93%
Wind Speed SE 5 mph
Barometer 30.24 in (1022.4 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 24 Dec 5:51 am CST
Extended Forecast for

Castle Hills TX

Dense Fog Advisory until December 24, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until December 24, 09:00am

    NOW until 9:00am Wed

    Dense Fog Advisory

  • Today

    High: 78 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 63. South wind around 5 mph.

    Low: 63 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: Cloudy through mid morning, then gradual clearing, with a high near 79. South wind around 5 mph.

    High: 79 °F

    Gradual
    Clearing

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 63. South wind around 5 mph.

    Low: 63 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 80. South southwest wind around 5 mph.

    High: 80 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 65. South wind around 5 mph.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 81. South wind 5 to 10 mph.

    High: 81 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 65. South southeast wind around 5 mph.

    Low: 65 °F

    Mostly Cloudy

Detailed Forecast

Today
Areas of dense fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 78. South wind around 5 mph.
Tonight
Increasing clouds, with a low around 63. South wind around 5 mph.
Christmas Day
Cloudy through mid morning, then gradual clearing, with a high near 79. South wind around 5 mph.
Thursday Night
Increasing clouds, with a low around 63. South wind around 5 mph.
Friday
Partly sunny, with a high near 80. South southwest wind around 5 mph.
Friday Night
Partly cloudy, with a low around 65. South wind around 5 mph.
Saturday
Partly sunny, with a high near 81. South wind 5 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 65. South southeast wind around 5 mph.
Sunday
Mostly cloudy, with a high near 77. South wind 5 to 10 mph becoming north northeast in the afternoon.
Sunday Night
Mostly cloudy, with a low around 44.
Monday
Mostly cloudy, with a high near 51.
Monday Night
Mostly cloudy, with a low around 36.
Tuesday
Partly sunny, with a high near 57.
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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:
5:42 am CST Dec 24, 2025
Forecast Valid:
6am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation