Upcoming Pattern Shift to Bring Heavy Mountain Snow to the West

Heavy, accumulating snow is likely today in the Cascades and Sierra Nevada. Another Bering Sea storm will bring strong winds and heavy precipitation to the Aleutians and southwest Alaska into Thursday. Light snow is expected from the Ohio Valley into the Northeast. A widespread and significant winter storm is expected to move into the Central Rockies and High Plains Thursday into Friday. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125ft.

mist

50°F

10°C

Humidity 100%
Wind Speed W 3 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 50°F (10°C)
Visibility 1.25 mi
Last update 08 Dec 02:35 AM PST
Extended Forecast for

Saint Helena CA

  • Overnight

    Overnight: Areas of fog.  Otherwise, mostly cloudy, with a steady temperature around 48. Calm wind.

    Areas Fog

    Low: 48 °F

  • Wednesday

    Wednesday: Areas of fog before 1pm.  Otherwise, cloudy, with a high near 56. Light and variable wind.

    Areas Fog

    High: 56 °F

  • Wednesday
    Night

    Wednesday Night: A 30 percent chance of rain, mainly between 10pm and 4am.  Cloudy, with a low around 41. Calm wind.  New precipitation amounts of less than a tenth of an inch possible.

    Chance Rain

    Low: 41 °F

  • Thursday

    Thursday: A 20 percent chance of rain before 10am.  Partly sunny, then gradually becoming sunny, with a high near 57. Northwest wind 3 to 7 mph.

    Slight Chance
    Rain then
    Sunny

    High: 57 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 35. North northwest wind 3 to 5 mph.

    Mostly Clear

    Low: 35 °F

  • Friday

    Friday: Areas of frost between 7am and 8am.  Otherwise, sunny, with a high near 57.

    Areas Frost
    then Sunny

    High: 57 °F

  • Friday
    Night

    Friday Night: Patchy frost after 2am.  Otherwise, partly cloudy, with a low around 34.

    Mostly Clear
    then Patchy
    Frost

    Low: 34 °F

  • Saturday

    Saturday: Areas of frost before 9am.  Otherwise, mostly sunny, with a high near 55.

    Areas Frost
    then Mostly
    Sunny

    High: 55 °F

  • Saturday
    Night

    Saturday Night: A chance of rain, mainly after 10pm.  Mostly cloudy, with a low around 39.

    Chance Rain

    Low: 39 °F

Detailed Forecast

Overnight
Areas of fog. Otherwise, mostly cloudy, with a steady temperature around 48. Calm wind.
Wednesday
Areas of fog before 1pm. Otherwise, cloudy, with a high near 56. Light and variable wind.
Wednesday Night
A 30 percent chance of rain, mainly between 10pm and 4am. Cloudy, with a low around 41. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 20 percent chance of rain before 10am. Partly sunny, then gradually becoming sunny, with a high near 57. Northwest wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 35. North northwest wind 3 to 5 mph.
Friday
Areas of frost between 7am and 8am. Otherwise, sunny, with a high near 57.
Friday Night
Patchy frost after 2am. Otherwise, partly cloudy, with a low around 34.
Saturday
Areas of frost before 9am. Otherwise, mostly sunny, with a high near 55.
Saturday Night
A chance of rain, mainly after 10pm. Mostly cloudy, with a low around 39.
Sunday
Rain likely. Mostly cloudy, with a high near 51.
Sunday Night
Rain. Cloudy, with a low around 43.
Monday
Rain. Cloudy, with a high near 52.
Monday Night
Rain. Mostly cloudy, with a low around 38.
Tuesday
A chance of rain. Partly sunny, with a high near 50.
Click Map For Forecast
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
8:57 pm PST Dec 7, 2021
2am PST Dec 8, 2021-6pm PST Dec 14, 2021
 
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