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.

Mostly Cloudy

67°F

19°C

Humidity 93%
Wind Speed S 8 mph
Barometer 30.24 in (1022.3 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 24 Dec 3:51 am CST
Extended Forecast for

San Antonio International Airport TX

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

    NOW until 9:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 64 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: Areas of dense fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. South wind 5 to 10 mph.

    High: 79 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: 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 5 to 10 mph.

    High: 79 °F

    Gradual
    Clearing

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 63. South wind 5 to 10 mph.

    Low: 63 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 80. South southwest wind 5 to 10 mph.

    High: 80 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64. South wind around 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Saturday

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

    High: 81 °F

    Partly Sunny

Detailed Forecast

Overnight
Patchy dense fog. Otherwise, cloudy, with a low around 64. South southeast wind around 5 mph.
Wednesday
Areas of dense fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. South wind 5 to 10 mph.
Wednesday Night
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 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 63. South wind 5 to 10 mph.
Friday
Partly sunny, with a high near 80. South southwest wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 64. 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 64. South southeast wind 5 to 10 mph.
Sunday
Mostly cloudy, with a high near 76.
Sunday Night
Mostly cloudy, with a low around 44.
Monday
Mostly cloudy, with a high near 52.
Monday Night
Mostly cloudy, with a low around 37.
Tuesday
Partly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Antonio International Airport TX
 29.55°N 98.48°W (Elev. 797 ft)
Last Update:
3:44 am CST Dec 24, 2025
Forecast Valid:
4am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
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