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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Mist

57°F

14°C

Humidity 93%
Wind Speed NNW 3 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 55°F (13°C)
Visibility 5.00 mi
Last update 01 Jan 03:35 PM PST
Extended Forecast for

Yountville CA

Coastal Flood Advisory January 1, 03:51pm until January 4, 02:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory January 1, 03:51pm until January 4, 02:00pm

    NOW until 2:00pm Sun

    Coastal Flood Advisory

  • New Year's Day

    High: 54 °F

    Chance Rain

  • Tonight

    Tonight: Rain, mainly before 5am. Low around 50. Southeast wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Rain

  • Friday

    Friday: A slight chance of rain before 7am, then a slight chance of rain after 1pm. Mostly cloudy, with a steady temperature around 52. Southeast wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: Rain before 1am, then showers and possibly a thunderstorm between 1am and 4am, then rain and possibly a thunderstorm after 4am. Low around 51. South wind 10 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 51 °F

    Showers

  • Saturday

    Saturday: Rain before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then rain and possibly a thunderstorm after 4pm. High near 55. South wind 11 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 55 °F

    Showers

  • Saturday Night

    Saturday Night: Rain. Low around 50. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 50 °F

    Rain

  • Sunday

    Sunday: Rain before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then rain after 1pm. High near 52. Chance of precipitation is 100%.

    High: 52 °F

    Showers

  • Sunday Night

    Sunday Night: Rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Rain

Detailed Forecast

New Year's Day
A 50 percent chance of rain. Cloudy, with a high near 54. South wind around 10 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain, mainly before 5am. Low around 50. Southeast wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A slight chance of rain before 7am, then a slight chance of rain after 1pm. Mostly cloudy, with a steady temperature around 52. Southeast wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Rain before 1am, then showers and possibly a thunderstorm between 1am and 4am, then rain and possibly a thunderstorm after 4am. Low around 51. South wind 10 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Rain before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then rain and possibly a thunderstorm after 4pm. High near 55. South wind 11 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Rain. Low around 50. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
Rain before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then rain after 1pm. High near 52. Chance of precipitation is 100%.
Sunday Night
Rain. Mostly cloudy, with a low around 44.
Monday
Rain likely. Mostly cloudy, with a high near 50.
Monday Night
A chance of rain, mainly before 4am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 42.
Tuesday
A slight chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 54.
Tuesday Night
A slight chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 40.
Wednesday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 52.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 37.
Thursday
A chance of rain. Mostly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Yountville CA
 38.4°N 122.34°W (Elev. 184 ft)
Last Update:
12:32 pm PST Jan 1, 2026
Forecast Valid:
3pm PST Jan 1, 2026-6pm PST Jan 8, 2026
 
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Additional Resources

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Chance of Precipitation