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

55°F

13°C

Humidity 71%
Wind Speed E 4 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 19 Jan 04:35 PM PST
Extended Forecast for

Napa CA

  • Tonight

    Tonight: Patchy dense fog after 7pm.  Otherwise, increasing clouds, with a low around 39. Calm wind.

    Low: 39 °F

    Patchy Dense
    Fog

  • Tuesday

    Tuesday: Areas of dense fog before 10am.  Otherwise, mostly sunny, then becoming cloudy during the afternoon, with a high near 61. Light and variable wind.

    High: 61 °F

    Areas Dense
    Fog then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 60. Calm wind.

    High: 60 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: Patchy fog before 2am, then patchy fog after 5am.  Otherwise, cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 10am.  Otherwise, partly sunny, with a high near 62.

    High: 62 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog.  Otherwise, partly cloudy, with a low around 43.

    Low: 43 °F

    Patchy Fog

  • Friday

    Friday: Areas of fog before 11am.  Otherwise, mostly sunny, with a high near 62.

    High: 62 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy dense fog after 7pm. Otherwise, increasing clouds, with a low around 39. Calm wind.
Tuesday
Areas of dense fog before 10am. Otherwise, mostly sunny, then becoming cloudy during the afternoon, with a high near 61. Light and variable wind.
Tuesday Night
Mostly cloudy, with a low around 44. Calm wind.
Wednesday
Cloudy, with a high near 60. Calm wind.
Wednesday Night
Patchy fog before 2am, then patchy fog after 5am. Otherwise, cloudy, with a low around 45. Calm wind.
Thursday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 62.
Thursday Night
Patchy fog. Otherwise, partly cloudy, with a low around 43.
Friday
Areas of fog before 11am. Otherwise, mostly sunny, with a high near 62.
Friday Night
Mostly clear, with a low around 42.
Saturday
Mostly sunny, with a high near 60.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
Partly sunny, with a high near 59.
Sunday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 41.
Monday
Areas of fog. Otherwise, partly sunny, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
1:15 pm PST Jan 19, 2026
4pm PST Jan 19, 2026-6pm PST Jan 26, 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