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 >

Hazardous Weather Conditions

Current conditions at

Livermore, Livermore Municipal Airport (KLVK)

Lat: 37.69278°NLon: 121.81444°WElev: 397.0ft.

Rain

57°F

14°C

Humidity 61%
Wind Speed S 21 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 44°F (7°C)
Visibility 5.00 mi
Last update 25 Dec 01:53 PM PST
Extended Forecast for

Livermore CA

Flood Watch December 25, 02:05pm until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 25, 02:05pm until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Christmas Day

    High: 55 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers, mainly before 1am. Low around 46. South southwest wind 13 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Showers

  • Friday

    Friday: A 50 percent chance of showers, mainly before 4pm. Mostly cloudy, with a high near 53. South southeast wind 10 to 15 mph, with gusts as high as 30 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 42. South southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 42 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 50. Light and variable wind becoming north 5 to 7 mph in the morning.

    High: 50 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Patchy frost after 2am. Otherwise, mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Frost

  • Sunday

    Sunday: Areas of frost before 9am. Otherwise, sunny, with a high near 50.

    High: 50 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 10pm. Otherwise, mostly clear, with a low around 34.

    Low: 34 °F

    Patchy Frost

Detailed Forecast

Christmas Day
A 40 percent chance of showers and thunderstorms. Some of the storms could be severe. Cloudy, with a high near 55. South southwest wind around 18 mph, with gusts as high as 34 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers, mainly before 1am. Low around 46. South southwest wind 13 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A 50 percent chance of showers, mainly before 4pm. Mostly cloudy, with a high near 53. South southeast wind 10 to 15 mph, with gusts as high as 30 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 42. South southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Partly sunny, with a high near 50. Light and variable wind becoming north 5 to 7 mph in the morning.
Saturday Night
Patchy frost after 2am. Otherwise, mostly clear, with a low around 34.
Sunday
Areas of frost before 9am. Otherwise, sunny, with a high near 50.
Sunday Night
Patchy frost after 10pm. Otherwise, mostly clear, with a low around 34.
Monday
Patchy frost before 9am. Otherwise, sunny, with a high near 52.
Monday Night
Patchy frost after 1am. Otherwise, mostly clear, with a low around 34.
Tuesday
Areas of frost. Otherwise, sunny, with a high near 54.
Tuesday Night
Patchy frost. Otherwise, mostly clear, with a low around 36.
Wednesday
Patchy frost. Otherwise, mostly sunny, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Livermore CA
 37.67°N 121.75°W (Elev. 558 ft)
Last Update:
12:26 pm PST Dec 25, 2025
Forecast Valid:
2pm PST Dec 25, 2025-6pm PST Dec 31, 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

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation