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.

Clear

48°F

9°C

Humidity 89%
Wind Speed N 0 MPH
Barometer 30.15 in (1021.0 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 19 Jan 09:54 AM PST
Extended Forecast for

4 Miles N Sonoma CA

  • 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

  • Tonight

    Tonight: 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. East wind 3 to 6 mph.

    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

  • Friday

    Friday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

M.L.King Day
Sunny, with a high near 61. North wind around 6 mph becoming calm in the afternoon.
Tonight
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. East wind 3 to 6 mph.
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 am PST Jan 19, 2026
10am PST Jan 19, 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