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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Overcast

69°F

21°C

Humidity 90%
Wind Speed SW 6 mph
Barometer 30.07 in (1016.5 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 26 Dec 2:51 am CST
Extended Forecast for

San Antonio TX

  • Overnight

    Overnight: Areas of fog. Otherwise, cloudy, with a low around 67. South southwest wind around 5 mph.

    Low: 67 °F

    Areas Fog

  • Friday

    Friday: Areas of fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 82. South southwest wind around 5 mph.

    High: 82 °F

    Areas Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 67. South southeast wind around 5 mph.

    Low: 67 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 80. South wind 5 to 10 mph.

    High: 80 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. South southeast wind 5 to 10 mph.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 80. South wind 5 to 10 mph.

    High: 80 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A slight chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 47. Southeast wind 5 to 10 mph becoming north 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

    Low: 47 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 52. North wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 52 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 39. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Areas of fog. Otherwise, cloudy, with a low around 67. South southwest wind around 5 mph.
Friday
Areas of fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 82. South southwest wind around 5 mph.
Friday Night
Increasing clouds, with a low around 67. South southeast wind around 5 mph.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 80. South wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 67. South southeast wind 5 to 10 mph.
Sunday
Mostly cloudy, with a high near 80. South wind 5 to 10 mph.
Sunday Night
A slight chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 47. Southeast wind 5 to 10 mph becoming north 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Monday
Mostly cloudy, with a high near 52. North wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
Mostly cloudy, with a low around 39. North wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 55.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
Mostly cloudy, with a low around 44.
New Year's Day
Partly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
2:32 am CST Dec 26, 2025
Forecast Valid:
3am CST Dec 26, 2025-6pm CST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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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