Lowell to Impact Hawaii; Heat Persists in the South-Central U.S.

Hurricane Lowell is forecast to pass west of Kauai`s coastal waters tonight. Impacts such as high surf and heavy rain could impact all of the islands. Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley into this week with limited nighttime relief. Periods of moderate to heavy rainfall will be possible through Tuesday morning in the northern Rockies. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Clear

61°F

16°C

Humidity 82%
Wind Speed N 0 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 07 Sep 09:00 AM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Labor Day

    Labor Day: Sunny, with a high near 86. North northeast wind around 5 mph becoming calm  in the afternoon.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Light and variable wind.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 60. Calm wind.

    Low: 60 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny and hot, with a high near 96. Calm wind.

    High: 96 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Labor Day
Sunny, with a high near 86. North northeast wind around 5 mph becoming calm in the afternoon.
Tonight
Mostly clear, with a low around 56. Calm wind.
Tuesday
Mostly sunny, with a high near 90. Light and variable wind.
Tuesday Night
Increasing clouds, with a low around 60. Calm wind.
Wednesday
Partly sunny and hot, with a high near 96. Calm wind.
Wednesday Night
Partly cloudy, with a low around 66.
Thursday
Sunny, with a high near 95.
Thursday Night
Mostly clear, with a low around 58.
Friday
Mostly sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 55.
Saturday
Mostly sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 54.
Sunday
Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
5:01 am PDT Sep 7, 2026
9am PDT Sep 7, 2026-6pm PDT Sep 13, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database