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.

light rain,mist

55°F

13°C

Humidity 93%
Wind Speed SE 12 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 54°F (12°C)
Visibility 3.00 mi
Last update 01 Jan 09:20 PM PST
Extended Forecast for

Guerneville CA

Coastal Flood Advisory January 1, 09:38pm until January 4, 02:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory January 1, 09:38pm until January 4, 02:00pm

    NOW until 2:00pm Sun

    Coastal Flood Advisory

  • Tonight

    Low: 52 °F

    Rain Likely

  • Friday

    Friday: Rain, mainly after 4pm. High near 56. East southeast wind 7 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Slight Chance
    Rain then
    Rain

  • Friday Night

    Friday Night: Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then rain after 1am. Low around 52. South wind around 14 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 52 °F

    Showers

  • Saturday

    Saturday: Rain before 4pm, then showers and possibly a thunderstorm after 4pm. High near 56. South wind 10 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 56 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 51. South wind 10 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 51 °F

    Showers

  • Sunday

    Sunday: Rain. High near 54. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 54 °F

    Rain

  • Sunday Night

    Sunday Night: Rain. Low around 46. Chance of precipitation is 80%.

    Low: 46 °F

    Rain

  • Monday

    Monday: Rain. Mostly cloudy, with a high near 53.

    High: 53 °F

    Rain

Detailed Forecast

Tonight
Rain likely, mainly before midnight. Cloudy, with a low around 52. East southeast wind 5 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain, mainly after 4pm. High near 56. East southeast wind 7 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then rain after 1am. Low around 52. South wind around 14 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Saturday
Rain before 4pm, then showers and possibly a thunderstorm after 4pm. High near 56. South wind 10 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 51. South wind 10 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Rain. High near 54. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Rain. Low around 46. Chance of precipitation is 80%.
Monday
Rain. Mostly cloudy, with a high near 53.
Monday Night
Rain likely, mainly before 10pm. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 43.
Tuesday
A slight chance of rain before 10am. Patchy fog before 10am. Otherwise, mostly sunny, with a high near 56.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Wednesday
A chance of rain. Partly sunny, with a high near 55.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 40.
Thursday
A chance of rain. Partly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.49°N 123°W (Elev. 197 ft)
Last Update:
12:32 pm PST Jan 1, 2026
Forecast Valid:
9pm PST Jan 1, 2026-6pm PST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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