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

Hazardous Weather Conditions

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

Fog

41°F

5°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.22 in (1023.37 mb)
Dewpoint 41°F (5°C)
Visibility 0.50 mi
Last update 27 Nov 01:35 AM PST
Extended Forecast for

Saint Helena CA

Dense Fog Advisory November 27, 01:50am until November 27, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory November 27, 01:50am until November 27, 10:00am

    NOW until 10:00am Thu

    Dense Fog Advisory

  • Overnight

    Low: 45 °F

    Mostly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Mostly sunny, with a high near 67. Calm wind.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 64. Light and variable wind.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43. Light and variable wind.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 63.

    High: 63 °F

    Patchy Fog
    then Mostly
    Sunny

Detailed Forecast

Overnight
Mostly cloudy, with a low around 45. Calm wind.
Thanksgiving Day
Mostly sunny, with a high near 67. Calm wind.
Thursday Night
Partly cloudy, with a low around 44. Calm wind.
Friday
Sunny, with a high near 64. Light and variable wind.
Friday Night
Partly cloudy, with a low around 43. Light and variable wind.
Saturday
Sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 43.
Sunday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Mostly sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 43.
Wednesday
Sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.49°W (Elev. 594 ft)
Last Update:
12:26 am PST Nov 27, 2025
Forecast Valid:
1am PST Nov 27, 2025-6pm PST Dec 3, 2025
 
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Additional Resources

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