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

46°F

8°C

Humidity 95%
Wind Speed NE 3 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 45°F (7°C)
Visibility 6.00 mi
Last update 18 Jan 09:54 PM PST
Extended Forecast for

Napa CA

  • Tonight

    Tonight: Patchy fog before midnight.  Otherwise, partly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Patchy Fog
    then Partly
    Cloudy

  • M.L.King Day

    M.L.King Day: Patchy dense fog before 9am.  Otherwise, mostly sunny, with a high near 63. Calm wind.

    High: 63 °F

    Patchy Dense
    Fog then
    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: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 63. Light east northeast wind.

    High: 63 °F

    Patchy Fog
    then 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 62.

    High: 62 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog.  Otherwise, mostly cloudy, with a low around 43.

    Low: 43 °F

    Patchy Fog

  • Thursday

    Thursday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 63.

    High: 63 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Areas of fog.  Otherwise, mostly clear, with a low around 42.

    Low: 42 °F

    Areas Fog

Detailed Forecast

Tonight
Patchy fog before midnight. Otherwise, partly cloudy, with a low around 41. Calm wind.
M.L.King Day
Patchy dense fog before 9am. Otherwise, mostly sunny, with a high near 63. Calm wind.
Monday Night
Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 40. Calm wind.
Tuesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 63. Light east northeast wind.
Tuesday Night
Mostly cloudy, with a low around 42. Calm wind.
Wednesday
Partly sunny, with a high near 62.
Wednesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 43.
Thursday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 63.
Thursday Night
Areas of fog. Otherwise, mostly clear, with a low around 42.
Friday
Areas of fog before 11am. Otherwise, mostly sunny, with a high near 61.
Friday Night
Areas of fog. Otherwise, partly cloudy, with a low around 42.
Saturday
Areas of fog. Otherwise, mostly sunny, with a high near 60.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 41.
Sunday
Areas of fog. Otherwise, mostly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
12:26 pm PST Jan 18, 2026
10pm PST Jan 18, 2026-6pm PST Jan 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database