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

Lala Impacting Hawaii; Severe Thunderstorm and Flash Flooding Risks; Excessive Heat

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorm, heavy rainfall, and flash flooding threats continue from the Midwest to the Mid-Atlantic and across the central High Plains. Record heat continues for areas of the central/southern Plain into the Southeast Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Overcast

55°F

13°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 53°F (12°C)
Visibility 8.00 mi
Last update 17 Aug 03:53 AM PDT
Extended Forecast for

Saint Helena CA

  • Today

    Today: Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 88. Light and variable wind.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, increasing clouds, with a low around 53. Calm wind.

    Low: 53 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 91. Calm wind.

    High: 91 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 90. Calm wind.

    High: 90 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Areas of fog before 9am. Otherwise, partly sunny, with a high near 87.

    High: 87 °F

    Areas Fog
    then Mostly
    Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 88. Light and variable wind.
Tonight
Patchy fog after 1am. Otherwise, increasing clouds, with a low around 53. Calm wind.
Tuesday
Areas of fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 91. Calm wind.
Tuesday Night
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 55. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 90. Calm wind.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 89.
Thursday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 55.
Friday
Areas of fog before 9am. Otherwise, partly sunny, with a high near 87.
Friday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 54.
Saturday
Areas of fog. Otherwise, mostly sunny, with a high near 87.
Saturday Night
Patchy fog. Otherwise, mostly clear, with a low around 54.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.49°N 122.45°W (Elev. 230 ft)
Last Update:
2:41 am PDT Aug 17, 2026
Forecast Valid:
4am PDT Aug 17, 2026-6pm PDT Aug 23, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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Chance of Precipitation