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Heavy Snow in the Sierra Nevada; Heavy Rainfall in Texas Sunday

Heavy snow is expected in the Sierra Nevada mountain ranges into Saturday causing hazardous travel conditions. Winter Storm Warnings have been issued. Thunderstorms and moderate to heavy rainfall are expected across portions of eastern Texas into Louisiana on Sunday. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Fog

48°F

9°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.75 in (1007.45 mb)
Dewpoint 48°F (9°C)
Visibility 0.50 mi
Last update 13 Nov 09:05 PM PST
Extended Forecast for

Saint Helena CA

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm. Patchy fog. Otherwise, partly cloudy, with a low around 42. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Areas
    Fog

  • Saturday

    Saturday: Areas of fog before 11am. Otherwise, partly sunny, with a high near 63. Light and variable wind.

    High: 63 °F

    Areas Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog between 10pm and 3am. Otherwise, cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Patchy Fog

  • Sunday

    Sunday: Rain, mainly before 4pm. High near 59. South wind 3 to 7 mph. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 59 °F

    Rain

  • Sunday Night

    Sunday Night: A 50 percent chance of rain before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 40. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Chance Rain
    and Patchy
    Fog then
    Patchy Fog

  • Monday

    Monday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 61.

    High: 61 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 1am. Patchy frost after 4am. Otherwise, mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Frost and
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Patchy frost before 8am. Otherwise, sunny, with a high near 60.

    High: 60 °F

    Patchy Frost
    and Patchy
    Fog then
    Sunny

  • Tuesday Night

    Tuesday Night: Rain, mainly after 10pm. Patchy fog between 9pm and 1am. Otherwise, mostly cloudy, with a low around 42.

    Low: 42 °F

    Rain and
    Patchy Fog

Detailed Forecast

Tonight
A 20 percent chance of rain before 10pm. Patchy fog. Otherwise, partly cloudy, with a low around 42. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Areas of fog before 11am. Otherwise, partly sunny, with a high near 63. Light and variable wind.
Saturday Night
Patchy fog between 10pm and 3am. Otherwise, cloudy, with a low around 46. Calm wind.
Sunday
Rain, mainly before 4pm. High near 59. South wind 3 to 7 mph. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A 50 percent chance of rain before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 40. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Monday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 61.
Monday Night
Patchy fog after 1am. Patchy frost after 4am. Otherwise, mostly clear, with a low around 35.
Tuesday
Patchy fog before 9am. Patchy frost before 8am. Otherwise, sunny, with a high near 60.
Tuesday Night
Rain, mainly after 10pm. Patchy fog between 9pm and 1am. Otherwise, mostly cloudy, with a low around 42.
Wednesday
Rain. Cloudy, with a high near 56.
Wednesday Night
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 39.
Thursday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 58.
Thursday Night
Patchy fog. Patchy frost. Otherwise, partly cloudy, with a low around 35.
Friday
Patchy fog. Patchy frost. Otherwise, mostly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
Last Update:
8:49 pm PST Nov 13, 2026
Forecast Valid:
9pm PST Nov 13, 2026-6pm PST Nov 20, 2026
 
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Additional Resources

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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