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

Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Partly Cloudy

43°F

6°C

Humidity 86%
Wind Speed E 16 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 39°F (4°C)
Visibility 8.00 mi
Wind Chill35°F (2°C)
Last update 30 Dec 10:35 AM PST
Extended Forecast for

Yountville CA

Coastal Flood Advisory December 31, 05:00am until January 4, 02:00pm
Click here for hazard details and duration
Coastal Flood Advisory

  • Today

    Today: Partly sunny, with a high near 55. East northeast wind 5 to 8 mph.

    High: 55 °F

    Partly Sunny

  • Tonight

    Tonight: Cloudy, with a low around 43. North northeast wind around 6 mph.

    Low: 43 °F

    Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of rain after 10am. Patchy fog after 1pm. Otherwise, cloudy, with a high near 52. Calm wind becoming east northeast 5 to 8 mph in the afternoon. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Chance Rain
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: Rain. Widespread fog, mainly between 8pm and 10pm. Low around 46. Calm wind becoming east around 6 mph in the evening. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 46 °F

    Rain and Fog

  • New Year's Day

    New Year's Day: Rain. Patchy fog. High near 54. South southeast wind 5 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 54 °F

    Rain and
    Patchy Fog

  • Thursday Night

    Thursday Night: Rain before 4am, then showers and possibly a thunderstorm after 4am. Widespread fog, mainly between 7pm and 10pm. Low around 51. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Showers and
    Fog

  • Friday

    Friday: Showers and possibly a thunderstorm before 10am, then rain after 10am. Patchy fog before 10am, then patchy fog after 4pm. High near 55. Chance of precipitation is 80%.

    High: 55 °F

    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Rain. Patchy fog. Otherwise, cloudy, with a low around 44.

    Low: 44 °F

    Rain and
    Patchy Fog

  • Saturday

    Saturday: Rain likely. Areas of fog. Otherwise, mostly cloudy, with a high near 52.

    High: 52 °F

    Rain Likely
    and Areas Fog

Detailed Forecast

Today
Partly sunny, with a high near 55. East northeast wind 5 to 8 mph.
Tonight
Cloudy, with a low around 43. North northeast wind around 6 mph.
Wednesday
A 50 percent chance of rain after 10am. Patchy fog after 1pm. Otherwise, cloudy, with a high near 52. Calm wind becoming east northeast 5 to 8 mph in the afternoon. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Widespread fog, mainly between 8pm and 10pm. Low around 46. Calm wind becoming east around 6 mph in the evening. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
New Year's Day
Rain. Patchy fog. High near 54. South southeast wind 5 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain before 4am, then showers and possibly a thunderstorm after 4am. Widespread fog, mainly between 7pm and 10pm. Low around 51. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and possibly a thunderstorm before 10am, then rain after 10am. Patchy fog before 10am, then patchy fog after 4pm. High near 55. Chance of precipitation is 80%.
Friday Night
Rain. Patchy fog. Otherwise, cloudy, with a low around 44.
Saturday
Rain likely. Areas of fog. Otherwise, mostly cloudy, with a high near 52.
Saturday Night
Rain likely. Widespread fog, mainly after 10pm. Otherwise, mostly cloudy, with a low around 42.
Sunday
A chance of rain. Widespread fog. Otherwise, mostly cloudy, with a high near 52.
Sunday Night
Rain likely. Widespread fog. Otherwise, mostly cloudy, with a low around 42.
Monday
Rain likely. Widespread fog. Otherwise, mostly cloudy, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
Yountville CA
 38.4°N 122.34°W (Elev. 184 ft)
Last Update:
12:27 am PST Dec 30, 2025
Forecast Valid:
10am PST Dec 30, 2025-6pm PST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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