National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Severe Thunderstorms and Excessive Rainfall Thursday

Severe thunderstorms posing a risk for strong gusts and/or large hail are possible across portions of the northern and central Plains, the Lower Missouri to Lower Ohio Valleys, and across the Mid-Atlantic Thursday afternoon and evening. Excessive rainfall may bring flash and urban flooding over the Mid-Mississippi and Ohio Valleys, and Mid-Atlantic on Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

57°F

14°C

Humidity 82%
Wind Speed SSE 9 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 08 Jul 09:00 PM PDT
Extended Forecast for

Saint Helena CA

Coastal Flood Advisory July 9, 04:00pm until July 16, 04:00am
Click here for hazard details and duration
Coastal Flood Advisory

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, increasing clouds, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 91 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 55. Light and variable wind.

    Low: 55 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, then gradually becoming sunny, with a high near 89. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 89 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 93.

    High: 93 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 94.

    High: 94 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, increasing clouds, with a low around 53. Calm wind.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Increasing clouds, with a low around 55. Light and variable wind.
Friday
Partly sunny, then gradually becoming sunny, with a high near 89. Calm wind becoming south southwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 93.
Saturday Night
Mostly cloudy, with a low around 62.
Sunday
Partly sunny, with a high near 94.
Sunday Night
Partly cloudy, with a low around 63.
Monday
Mostly sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Sunny and hot, with a high near 96.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
Last Update:
9:06 pm PDT Jul 8, 2026
Forecast Valid:
9pm PDT Jul 8, 2026-6pm PDT Jul 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation