Thunderstorms and Heavy Rainfall from the Plains to the Mid-Atlantic

Severe thunderstorms producing damaging winds are most likely over parts of the Dakotas into Minnesota from this afternoon into the overnight, with other isolated storms producing hail or wind over the northern High Plains. In the Northern Plains into the Upper Great Lakes and Mid-Atlantic, heavy to excessive rain may bring flash and urban flooding through Wednesday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

55°F

13°C

Humidity 87%
Wind Speed W 6 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 07 Jul 09:00 AM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Today

    Today: Sunny, with a high near 82. Calm wind becoming south around 6 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Areas of fog after 1am.  Otherwise, increasing clouds, with a low around 50. Light and variable wind.

    Low: 50 °F

    Mostly Clear
    then Areas
    Fog

  • Wednesday

    Wednesday: Areas of fog before 8am.  Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 86. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 86 °F

    Areas Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. South southwest wind around 5 mph becoming calm  in the evening.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 54.

    Low: 54 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Patchy fog before 7am.  Otherwise, sunny, with a high near 90.

    High: 90 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 92.

    High: 92 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 82. Calm wind becoming south around 6 mph in the afternoon.
Tonight
Areas of fog after 1am. Otherwise, increasing clouds, with a low around 50. Light and variable wind.
Wednesday
Areas of fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 86. Calm wind becoming south southwest around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 52. South southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 54.
Friday
Patchy fog before 7am. Otherwise, sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 55.
Saturday
Partly sunny, with a high near 92.
Saturday Night
Mostly cloudy, with a low around 58.
Sunday
Partly sunny, with a high near 89.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
9:07 am PDT Jul 7, 2026
9am PDT Jul 7, 2026-6pm PDT Jul 13, 2026
 
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Additional Resources

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Hourly Weather Forecast

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