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Hazardous Weather Impacts on the East and West Coasts

A cold front will continue to progress eastward today and Friday across the Eastern Seaboard with showers and thunderstorms bringing isolated heavy rainfall, gusty to damaging winds, and a possible tornado. A series of Pacific storms will begin to push into the Pacific Northwest today with impacts from heavy rain and snow continuing through the middle of next week. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Clear

72°F

22°C

Humidity 40%
Wind Speed SW 8 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 05 Nov 03:00 PM PST
Extended Forecast for

4 Miles E Saint Helena CA

Coastal Flood Advisory November 5, 03:17pm until November 13, 04:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory November 5, 03:17pm until November 13, 04:00pm

    NOW until 4:00pm Fri

    Coastal Flood Advisory

  • Tonight

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, then gradually becoming sunny, with a high near 76. Calm wind.

    High: 76 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76. Calm wind.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, sunny, with a high near 75.

    High: 75 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Areas of fog before 8am. Otherwise, mostly sunny, with a high near 72.

    High: 72 °F

    Areas Fog
    then Mostly
    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 44. Calm wind.
Friday
Partly sunny, then gradually becoming sunny, with a high near 76. Calm wind.
Friday Night
Mostly clear, with a low around 44. Calm wind.
Saturday
Sunny, with a high near 76. Calm wind.
Saturday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 43. Calm wind.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 75.
Sunday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 44.
Monday
Areas of fog before 8am. Otherwise, mostly sunny, with a high near 72.
Monday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 44.
Tuesday
Areas of fog before 8am. Otherwise, sunny, with a high near 73.
Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 45.
Veterans Day
A slight chance of rain. Areas of fog. Otherwise, partly sunny, with a high near 70.
Wednesday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 45.
Thursday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
Last Update:
2:12 pm PST Nov 5, 2026
Forecast Valid:
3pm PST Nov 5, 2026-6pm PST Nov 12, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation