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

Livermore, Livermore Municipal Airport (KLVK)

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

Rain

67°F

19°C

Humidity 52%
Wind Speed S 17 MPH
Barometer 29.51 in (999.32 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 24 Dec 12:53 AM PST
Extended Forecast for

Livermore Municipal CA

Flood Watch December 24, 01:08am until December 26, 10:00pm
Wind Advisory until December 24, 04:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 24, 01:08am until December 26, 10:00pm
    Wind Advisory until December 24, 04:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 53 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers likely, mainly after 5pm. Mostly cloudy, with a high near 59. Light south southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 59 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers, with thunderstorms also possible after 4am. Some of the storms could be severe. Steady temperature around 54. Breezy, with a south southeast wind 6 to 11 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 49 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 54 °F

    Showers
    Likely then
    Severe
    Thunderstorms
    and Breezy

  • Christmas Day

    Christmas Day: Showers and possibly a thunderstorm. Some of the storms could be severe. High near 55. Breezy, with a south wind 22 to 24 mph, with gusts as high as 48 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 55 °F

    Breezy.
    Severe
    Thunderstorms
    then Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 47. South wind 14 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Severe
    Thunderstorms

  • Friday

    Friday: Showers, with thunderstorms also possible after 4pm. High near 54. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 54 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 41. Chance of precipitation is 60%.

    Low: 41 °F

    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers before 10am. Areas of fog before 11am. Otherwise, partly sunny, with a high near 52.

    High: 52 °F

    Slight Chance
    Showers and
    Areas Fog
    then Mostly
    Sunny

Detailed Forecast

Overnight
Showers. Low around 53. Breezy, with a south wind 14 to 19 mph increasing to 20 to 25 mph. Winds could gust as high as 55 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Showers likely, mainly after 5pm. Mostly cloudy, with a high near 59. Light south southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Showers, with thunderstorms also possible after 4am. Some of the storms could be severe. Steady temperature around 54. Breezy, with a south southeast wind 6 to 11 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 49 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Christmas Day
Showers and possibly a thunderstorm. Some of the storms could be severe. High near 55. Breezy, with a south wind 22 to 24 mph, with gusts as high as 48 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 47. South wind 14 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers, with thunderstorms also possible after 4pm. High near 54. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Saturday
A slight chance of showers before 10am. Areas of fog before 11am. Otherwise, partly sunny, with a high near 52.
Saturday Night
Patchy fog after 4am. Patchy frost after 4am. Otherwise, mostly clear, with a low around 36.
Sunday
Patchy fog before 8am. Patchy frost before 8am. Otherwise, sunny, with a high near 52.
Sunday Night
Patchy frost. Otherwise, mostly clear, with a low around 35.
Monday
Patchy fog. Patchy frost. Otherwise, sunny, with a high near 53.
Monday Night
Patchy fog. Otherwise, partly cloudy, with a low around 36.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
Livermore Municipal CA
 37.69°N 121.81°W (Elev. 400 ft)
Last Update:
12:27 am PST Dec 24, 2025
Forecast Valid:
1am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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