Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Mist

43°F

6°C

Humidity 96%
Wind Speed E 10 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 42°F (6°C)
Visibility 5.00 mi
Wind Chill37°F (3°C)
Last update 20 Jan 12:54 AM PST
Extended Forecast for

4 Miles N Sonoma CA

  • Overnight

    Overnight: Partly cloudy, with a low around 52. North northeast wind around 7 mph.

    Low: 52 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 57. Northeast wind 3 to 7 mph.

    High: 57 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 49. North wind 3 to 5 mph.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 56. North northeast wind around 5 mph becoming calm  in the morning.

    High: 56 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49. Light north northwest wind.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 52. North northeast wind around 7 mph.
Tuesday
Partly sunny, with a high near 57. Northeast wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 49. North wind 3 to 5 mph.
Wednesday
Mostly cloudy, with a high near 56. North northeast wind around 5 mph becoming calm in the morning.
Wednesday Night
Mostly cloudy, with a low around 49. Light north northwest wind.
Thursday
Mostly sunny, with a high near 57.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 45.
Saturday
Sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Partly sunny, with a high near 54.
Sunday Night
Mostly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 56.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Sonoma CA
 38.36°N 122.45°W (Elev. 1818 ft)
12:26 am PST Jan 20, 2026
1am PST Jan 20, 2026-6pm PST Jan 26, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database