Frigid Airmass to Bring Significantly Colder Temperatures; Heavy Lake-effect Snow; Fire Concerns Across the Central Gulf Coast

A frigid cold airmass will bring significantly colder weather across the eastern two thirds of the country early this week. Temperatures will tie or break many records across the Southeast through tonight. Moderate to heavy lake effect snow will continue downwind of the Great Lakes. Gusty winds and dry conditions will support an elevated fire weather threat across the Central Gulf Coast. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

79°F

26°C

Humidity 44%
Wind Speed N 0 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 10 Nov 02:00 PM PST
Extended Forecast for

Saint Helena CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 81. Calm wind.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: Mostly cloudy, with a high near 76. Calm wind.

    High: 76 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 10 percent chance of rain after 4am.  Mostly cloudy, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Rain, mainly after 4pm.  Patchy fog before 7am. High near 63. Calm wind becoming south around 6 mph in the morning.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Chance Rain
    and Patchy
    Fog then Rain

  • Wednesday Night

    Wednesday Night: Rain before 4am, then showers likely and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall.  Low around 51. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 51 °F

    Heavy Rain

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm, then showers after 7am.  High near 58. Chance of precipitation is 80%.

    High: 58 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely.  Mostly cloudy, with a low around 44.

    Low: 44 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers.  Patchy fog before 7am.  Otherwise, partly sunny, with a high near 57.

    High: 57 °F

    Chance
    Showers and
    Patchy Fog

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 81. Calm wind.
Tonight
Mostly cloudy, with a low around 57. Calm wind.
Veterans Day
Mostly cloudy, with a high near 76. Calm wind.
Tuesday Night
A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 53. Calm wind.
Wednesday
Rain, mainly after 4pm. Patchy fog before 7am. High near 63. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain before 4am, then showers likely and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Low around 51. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Thursday
Showers likely and possibly a thunderstorm, then showers after 7am. High near 58. Chance of precipitation is 80%.
Thursday Night
Showers likely. Mostly cloudy, with a low around 44.
Friday
A chance of showers. Patchy fog before 7am. Otherwise, partly sunny, with a high near 57.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 46.
Saturday
Patchy fog. Otherwise, mostly sunny, with a high near 66.
Saturday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 49.
Sunday
A chance of rain. Areas of fog. Otherwise, partly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.49°N 122.48°W (Elev. 318 ft)
12:26 pm PST Nov 10, 2025
2pm PST Nov 10, 2025-6pm PST Nov 16, 2025
 
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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