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.

Clear

54°F

12°C

Humidity 93%
Wind Speed S 3 MPH
Barometer 29.8 in (1009.14 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 09 Oct 01:00 AM PDT
Extended Forecast for

Saint Helena CA

Coastal Flood Advisory October 9, 01:17am until October 14, 04:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory October 9, 01:17am until October 14, 04:00pm

    NOW until 4:00pm Wed

    Coastal Flood Advisory

  • Overnight

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 90. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, sunny, with a high near 72. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 72 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 11pm. Otherwise, mostly clear, with a low around 45. South southwest wind around 5 mph becoming calm in the evening.

    Low: 45 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 67.

    High: 67 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of rain before 11pm. Partly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Columbus Day

    Columbus Day: A slight chance of rain after 11am. Mostly sunny, with a high near 68.

    High: 68 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. Calm wind.
Friday
Sunny, with a high near 90. Calm wind becoming south southwest around 5 mph in the afternoon.
Friday Night
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 50. Calm wind.
Saturday
Patchy fog before 11am. Otherwise, sunny, with a high near 72. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 45. South southwest wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 67.
Sunday Night
A 20 percent chance of rain before 11pm. Partly cloudy, with a low around 44.
Columbus Day
A slight chance of rain after 11am. Mostly sunny, with a high near 68.
Monday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 44.
Tuesday
Areas of fog before 9am. Otherwise, sunny, with a high near 73.
Tuesday Night
Patchy fog. Otherwise, mostly clear, with a low around 45.
Wednesday
Areas of fog. Otherwise, sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
Last Update:
11:27 pm PDT Oct 8, 2026
Forecast Valid:
1am PDT Oct 9, 2026-6pm PDT Oct 15, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation