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

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Hazardous Weather Conditions

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Rain

55°F

13°C

Humidity 93%
Wind Speed SSE 11 MPH
Barometer 29.79 in (1008.81 mb)
Dewpoint 54°F (12°C)
Visibility 7.00 mi
Last update 02 Jan 10:00 PM PST
Extended Forecast for

Guerneville CA

Coastal Flood Advisory January 3, 02:00pm until January 4, 02:00pm
Coastal Flood Warning January 2, 10:20pm until January 3, 02:00pm
Click here for hazard details and duration
Coastal Flood Advisory
Coastal Flood Warning
  •  
    Coastal Flood Warning January 2, 10:20pm until January 3, 02:00pm

    NOW until 2:00pm Sat

    Coastal Flood Warning

  • Tonight

    Low: 52 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 4pm, then rain after 4pm. High near 55. South southwest wind 9 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 55 °F

    Showers

  • Saturday Night

    Saturday Night: Rain before 7pm, then showers and possibly a thunderstorm between 7pm and 1am, then rain after 1am. Low around 50. South wind 7 to 9 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 50 °F

    Showers

  • Sunday

    Sunday: Rain. High near 54. West wind 5 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 54 °F

    Rain

  • Sunday Night

    Sunday Night: Rain. Low around 46. Light southeast wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Rain

  • Monday

    Monday: Rain. High near 52. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 52 °F

    Rain

  • Monday Night

    Monday Night: Rain likely, mainly before 10pm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 46. Chance of precipitation is 60%.

    Low: 46 °F

    Rain Likely
    and Patchy
    Fog

  • Tuesday

    Tuesday: A slight chance of rain before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 56.

    High: 56 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Partly
    Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 1am, then rain after 1am. Low around 52. South wind 7 to 14 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers and possibly a thunderstorm before 4pm, then rain after 4pm. High near 55. South southwest wind 9 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Rain before 7pm, then showers and possibly a thunderstorm between 7pm and 1am, then rain after 1am. Low around 50. South wind 7 to 9 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Rain. High near 54. West wind 5 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain. Low around 46. Light southeast wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain. High near 52. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Rain likely, mainly before 10pm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Tuesday
A slight chance of rain before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 56.
Tuesday Night
A chance of rain after 10pm. Patchy fog before 9pm, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 43.
Wednesday
A chance of rain. Patchy fog before 7am. Otherwise, partly sunny, with a high near 55.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 39.
Thursday
Sunny, with a high near 54.
Thursday Night
Patchy frost. Otherwise, mostly clear, with a low around 37.
Friday
Areas of frost. Otherwise, sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.52°N 122.98°W (Elev. 95 ft)
Last Update:
12:26 pm PST Jan 2, 2026
Forecast Valid:
10pm PST Jan 2, 2026-6pm PST Jan 9, 2026
 
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