National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

KF6YUA Sebastopol (AR323)

Lat: 38.3803°NLon: 122.8242°WElev: 230.0ft.

NA

48°F

9°C

Humidity 99%
Wind Speed ESE 0 MPH
Barometer 30.32 in (1026.75 mb)
Dewpoint 48°F (9°C)
Visibility NA
Last update 25 Nov 11:07 PM PST
Extended Forecast for

8 Miles SSW Saint Helena CA

Dense Fog Advisory November 25, 11:17pm until November 26, 11:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory November 25, 11:17pm until November 26, 11:00am

    NOW until 11:00am Wed

    Dense Fog Advisory

  • Tonight

    Low: 42 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: Sunny, with a high near 66. Light and variable wind.

    High: 66 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Mostly sunny, with a high near 66. Calm wind.

    High: 66 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 63.

    High: 63 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy fog between 9pm and 11pm. Otherwise, partly cloudy, with a low around 44.

    Low: 44 °F

    Patchy Fog
    then Partly
    Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

Tonight
Patchy dense fog before 3am. Otherwise, partly cloudy, with a low around 42. Calm wind.
Wednesday
Sunny, with a high near 66. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 45. Calm wind.
Thanksgiving Day
Mostly sunny, with a high near 66. Calm wind.
Thursday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 45. Calm wind.
Friday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 63.
Friday Night
Patchy fog between 9pm and 11pm. Otherwise, partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 62.
Sunday Night
Partly cloudy, with a low around 42.
Monday
Sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
8 Miles SSW Saint Helena CA
 38.41°N 122.55°W (Elev. 492 ft)
Last Update:
10:12 pm PST Nov 25, 2025
Forecast Valid:
11pm PST Nov 25, 2025-6pm PST Dec 2, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation