Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

56°F

13°C

Humidity 74%
Wind Speed N 0 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 48°F (9°C)
Visibility 9.00 mi
Last update 18 Jan 05:53 PM PST
Extended Forecast for

4 Miles W Saint Helena CA

  • Tonight

    Tonight: Partly cloudy, with a low around 52. Calm wind becoming north around 5 mph after midnight.

    Low: 52 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 63. North wind around 5 mph becoming calm  in the morning.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49. Calm wind becoming north northeast around 6 mph after midnight.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. East northeast wind 3 to 6 mph.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 50. Light north northeast wind.

    Low: 50 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 52. Calm wind becoming north around 5 mph after midnight.
M.L.King Day
Sunny, with a high near 63. North wind around 5 mph becoming calm in the morning.
Monday Night
Mostly clear, with a low around 49. Calm wind becoming north northeast around 6 mph after midnight.
Tuesday
Mostly sunny, with a high near 60. East northeast wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 50. Light north northeast wind.
Wednesday
Partly sunny, with a high near 59.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
Sunny, with a high near 59.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 58.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 46.
Sunday
Mostly sunny, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Saint Helena CA
 38.52°N 122.55°W (Elev. 1998 ft)
12:26 pm PST Jan 18, 2026
6pm PST Jan 18, 2026-6pm PST Jan 25, 2026
 
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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