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

41°F

5°C

Humidity 93%
Wind Speed N 3 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 39°F (4°C)
Visibility 6.00 mi
Last update 18 Jan 11:30 PM PST
Extended Forecast for

4 Miles WSW Napa CA

  • Tonight

    Tonight: Patchy dense fog before midnight, then patchy dense fog after 5am.  Otherwise, partly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Patchy Dense
    Fog

  • M.L.King Day

    M.L.King Day: Patchy dense fog before 8am.  Otherwise, mostly sunny, with a high near 62. Light and variable wind.

    High: 62 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Monday Night

    Monday Night: Patchy fog after 9pm.  Otherwise, partly cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Patchy Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 11pm.  Otherwise, mostly cloudy, with a low around 42.

    Low: 42 °F

    Patchy Fog

  • Thursday

    Thursday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 61.

    High: 61 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Areas of fog.  Otherwise, mostly clear, with a low around 41.

    Low: 41 °F

    Areas Fog

Detailed Forecast

Tonight
Patchy dense fog before midnight, then patchy dense fog after 5am. Otherwise, partly cloudy, with a low around 41. Calm wind.
M.L.King Day
Patchy dense fog before 8am. Otherwise, mostly sunny, with a high near 62. Light and variable wind.
Monday Night
Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 40. Calm wind.
Tuesday
Mostly sunny, with a high near 61. Calm wind becoming east northeast around 5 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 42. Calm wind.
Wednesday
Partly sunny, with a high near 59.
Wednesday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 42.
Thursday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 61.
Thursday Night
Areas of fog. Otherwise, mostly clear, with a low around 41.
Friday
Areas of fog before 11am. Otherwise, mostly sunny, with a high near 59.
Friday Night
Patchy fog. Otherwise, partly cloudy, with a low around 41.
Saturday
Areas of fog. Otherwise, mostly sunny, with a high near 58.
Saturday Night
Areas of fog. Otherwise, partly cloudy, with a low around 40.
Sunday
Areas of fog. Otherwise, mostly sunny, with a high near 58.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Napa CA
 38.28°N 122.37°W (Elev. 407 ft)
12:26 pm PST Jan 18, 2026
11pm PST Jan 18, 2026-6pm PST Jan 25, 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