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 100%
Wind Speed N 0 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 43°F (6°C)
Visibility 4.00 mi
Last update 18 Jan 10:20 PM PST
Extended Forecast for

4 Miles N Sonoma CA

  • Tonight

    Tonight: Partly cloudy, with a low around 53. North wind around 6 mph.

    Low: 53 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 61. North wind around 6 mph becoming calm  in the afternoon.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 47. Calm wind becoming north around 6 mph after midnight.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59. East northeast wind 5 to 7 mph.

    High: 59 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 47. North wind 3 to 5 mph.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 53. North wind around 6 mph.
M.L.King Day
Sunny, with a high near 61. North wind around 6 mph becoming calm in the afternoon.
Monday Night
Mostly clear, with a low around 47. Calm wind becoming north around 6 mph after midnight.
Tuesday
Mostly sunny, with a high near 59. East northeast wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 47. North wind 3 to 5 mph.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 58.
Thursday Night
Mostly clear, with a low around 46.
Friday
Mostly sunny, with a high near 56.
Friday Night
Partly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Mostly sunny, with a high near 54.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Sonoma CA
 38.36°N 122.45°W (Elev. 1818 ft)
12:26 pm PST Jan 18, 2026
10pm PST Jan 18, 2026-6pm PST Jan 25, 2026
 
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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