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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. 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.

Overcast

57°F

14°C

Humidity 82%
Wind Speed SSE 17 MPH
Barometer 29.58 in (1001.69 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 24 Dec 10:20 PM PST
Extended Forecast for

Angwin CA

Flood Watch December 24, 10:32pm until December 26, 10:00pm
Wind Advisory until December 25, 10:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 24, 10:32pm until December 26, 10:00pm
    Wind Advisory until December 25, 10:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 51 °F

    Showers and
    Breezy

  • Christmas Day

    Christmas Day: Showers, with thunderstorms also possible after 10am. High near 49. South southwest wind 16 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    High: 49 °F

    Showers

  • Thursday Night

    Thursday Night: Showers. Low around 45. Southeast wind 14 to 20 mph becoming southwest in the evening. Winds could gust as high as 45 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 45 °F

    Showers

  • Friday

    Friday: Showers. High near 49. South wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 49 °F

    Showers

  • Friday Night

    Friday Night: Showers likely, mainly before 10pm. Mostly cloudy, with a low around 40. South wind around 6 mph becoming north northeast after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Showers
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 10am. Mostly sunny, with a high near 50.

    High: 50 °F

    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy frost between 7am and 8am. Otherwise, sunny, with a high near 52.

    High: 52 °F

    Patchy Frost
    then Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm. Steady temperature around 51. Breezy, with a south southeast wind 23 to 28 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Christmas Day
Showers, with thunderstorms also possible after 10am. High near 49. South southwest wind 16 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Thursday Night
Showers. Low around 45. Southeast wind 14 to 20 mph becoming southwest in the evening. Winds could gust as high as 45 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
Showers. High near 49. South wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 40. South wind around 6 mph becoming north northeast after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 20 percent chance of showers before 10am. Mostly sunny, with a high near 50.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Patchy frost between 7am and 8am. Otherwise, sunny, with a high near 52.
Sunday Night
Patchy frost after 3am. Otherwise, clear, with a low around 36.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 54.
Monday Night
Patchy frost. Otherwise, mostly clear, with a low around 37.
Tuesday
Patchy frost. Otherwise, sunny, with a high near 56.
Tuesday Night
Partly cloudy, with a low around 39.
Wednesday
Mostly sunny, with a high near 56.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Angwin CA
 38.59°N 122.42°W (Elev. 1450 ft)
Last Update:
4:56 pm PST Dec 24, 2025
Forecast Valid:
10pm PST Dec 24, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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