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

42°F

6°C

Humidity 100%
Wind Speed ESE 14 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 42°F (6°C)
Visibility 0.75 mi
Wind Chill35°F (2°C)
Last update 20 Jan 02:11 AM PST
Extended Forecast for

7 Miles WSW Napa Co. Airport CA

  • Overnight

    Overnight: Patchy dense fog.  Otherwise, mostly cloudy, with a low around 39. Light east wind.

    Low: 39 °F

    Patchy Dense
    Fog

  • Tuesday

    Tuesday: Patchy dense fog before 10am.  Otherwise, partly sunny, with a high near 58. East wind around 6 mph.

    High: 58 °F

    Patchy Dense
    Fog then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog between 11pm and midnight.  Otherwise, mostly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Patchy Fog
    then Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 58. Calm wind.

    High: 58 °F

    Cloudy

  • Wednesday Night

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

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 8am.  Otherwise, partly sunny, with a high near 60.

    High: 60 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 60.

    High: 60 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 39. Light east wind.
Tuesday
Patchy dense fog before 10am. Otherwise, partly sunny, with a high near 58. East wind around 6 mph.
Tuesday Night
Patchy fog between 11pm and midnight. Otherwise, mostly cloudy, with a low around 46. Calm wind.
Wednesday
Cloudy, with a high near 58. Calm wind.
Wednesday Night
Mostly cloudy, with a low around 47. Calm wind.
Thursday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 60.
Thursday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 46.
Friday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 60.
Friday Night
Mostly clear, with a low around 43.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 58.
Sunday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 43.
Monday
Partly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WSW Napa Co. Airport CA
 38.17°N 122.37°W (Elev. 3 ft)
12:26 am PST Jan 20, 2026
2am PST Jan 20, 2026-6pm PST Jan 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database