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

Heavy Snow in the Cascades and Northern Rockies; Wintry Mix in the Northeast; High Winds in Southern California

Two more cold fronts will pass through the Northwest U.S. this week with heavy mountain snow continuing across the Cascades, and northern Rockies. A quick moving storm system will bring mixed precipitation including some freezing rain across the Northeast U.S. today. High winds could blow down trees and power lines in the mountains of southern California this evening through Thursday. 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.

Partly Cloudy

59°F

15°C

Humidity 62%
Wind Speed W 11 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 07 Jan 03:20 PM PST
Extended Forecast for

Saint Helena CA

Extreme Cold Watch January 9, 01:00am until January 9, 09:00am
Click here for hazard details and duration
Extreme Cold Watch

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 38. West northwest wind around 6 mph becoming calm in the evening.

    Low: 38 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 53. Calm wind becoming north around 5 mph in the afternoon.

    High: 53 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 37. Light north wind.

    Low: 37 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 55. Light northeast wind.

    High: 55 °F

    Sunny

  • Friday Night

    Friday Night: Areas of frost after 1am. Otherwise, mostly clear, with a low around 34. Calm wind.

    Low: 34 °F

    Mostly Clear
    then Areas
    Frost

  • Saturday

    Saturday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 37 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 38. West northwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 53. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 37. Light north wind.
Friday
Sunny, with a high near 55. Light northeast wind.
Friday Night
Areas of frost after 1am. Otherwise, mostly clear, with a low around 34. Calm wind.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 59.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Sunny, with a high near 64.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Sunny, with a high near 66.
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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:
12:26 pm PST Jan 7, 2026
Forecast Valid:
3pm PST Jan 7, 2026-6pm PST Jan 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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