Winter Returns Across the Northern Tier; Record Warmth for the Southwest

A large high pressure system will usher in cold air for this first day of March across the northern Plains, Great Lakes, Northeast and mid-Atlantic. Some wintry precipitation may evolve across the mid-Mississippi Valley, Ohio Valley and mid-Atlantic through Monday. Meanwhile, record warmth will spread across the Southwest, southern Plains through early this week. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Rain

49°F

9°C

Humidity 96%
Wind Speed N 0 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 48°F (9°C)
Visibility 9.00 mi
Last update 02 Mar 01:53 AM PST
Extended Forecast for

Saint Helena CA

  • Overnight

    Overnight: A 20 percent chance of rain.  Patchy fog before 3am.  Otherwise, mostly cloudy, with a low around 48. Calm wind becoming north northwest around 5 mph.

    Low: 48 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Monday

    Monday: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 66. Calm wind becoming north northeast 5 to 7 mph.

    High: 66 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. West northwest wind around 6 mph.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog before 9am.  Otherwise, sunny, with a high near 68. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 68 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46. West northwest wind around 7 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 42.

    Low: 42 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Thursday Night

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

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of rain. Patchy fog before 3am. Otherwise, mostly cloudy, with a low around 48. Calm wind becoming north northwest around 5 mph.
Monday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 66. Calm wind becoming north northeast 5 to 7 mph.
Monday Night
Mostly clear, with a low around 45. West northwest wind around 6 mph.
Tuesday
Patchy fog before 9am. Otherwise, sunny, with a high near 68. Calm wind becoming west southwest around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 46. West northwest wind around 7 mph.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
Clear, with a low around 42.
Thursday
Sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 71.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 50.
Sunday
Sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
12:26 am PST Mar 2, 2026
2am PST Mar 2, 2026-6pm PDT Mar 8, 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