Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. 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 SSW 21 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 15 Jul 07:50 PM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Tonight

    Tonight: Widespread fog.  Otherwise, increasing clouds, with a low around 50. West wind around 5 mph becoming calm  in the evening.

    Low: 50 °F

    Fog

  • Wednesday

    Wednesday: Widespread fog, mainly before 7am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 79 °F

    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Widespread fog, mainly after midnight.  Otherwise, increasing clouds, with a low around 50. West southwest wind around 5 mph becoming calm  in the evening.

    Low: 50 °F

    Fog

  • Thursday

    Thursday: Widespread fog before 9am.  Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 82. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 82 °F

    Fog then
    Sunny

  • Thursday Night

    Thursday Night: Widespread fog, mainly after 4am.  Otherwise, partly cloudy, with a low around 49. Southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 49 °F

    Fog

  • Friday

    Friday: Widespread fog, mainly before 8am.  Otherwise, mostly sunny, with a high near 85.

    High: 85 °F

    Fog then
    Sunny

  • Friday Night

    Friday Night: Areas of fog after midnight.  Otherwise, mostly clear, with a low around 50.

    Low: 50 °F

    Clear then
    Areas Fog

  • Saturday

    Saturday: Widespread fog before 9am.  Otherwise, sunny, with a high near 86.

    High: 86 °F

    Fog then
    Sunny

  • Saturday Night

    Saturday Night: Widespread fog, mainly after 2am.  Otherwise, mostly clear, with a low around 50.

    Low: 50 °F

    Clear then
    Fog

Detailed Forecast

Tonight
Widespread fog. Otherwise, increasing clouds, with a low around 50. West wind around 5 mph becoming calm in the evening.
Wednesday
Widespread fog, mainly before 7am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night
Widespread fog, mainly after midnight. Otherwise, increasing clouds, with a low around 50. West southwest wind around 5 mph becoming calm in the evening.
Thursday
Widespread fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 82. Calm wind becoming southwest around 6 mph in the afternoon.
Thursday Night
Widespread fog, mainly after 4am. Otherwise, partly cloudy, with a low around 49. Southwest wind 5 to 7 mph becoming calm in the evening.
Friday
Widespread fog, mainly before 8am. Otherwise, mostly sunny, with a high near 85.
Friday Night
Areas of fog after midnight. Otherwise, mostly clear, with a low around 50.
Saturday
Widespread fog before 9am. Otherwise, sunny, with a high near 86.
Saturday Night
Widespread fog, mainly after 2am. Otherwise, mostly clear, with a low around 50.
Sunday
Areas of fog before 8am. Otherwise, sunny, with a high near 87.
Sunday Night
Widespread fog. Otherwise, mostly clear, with a low around 51.
Monday
Widespread fog. Otherwise, sunny, with a high near 84.
Monday Night
Widespread fog. Otherwise, partly cloudy, with a low around 50.
Tuesday
Widespread fog. Otherwise, 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)
1:26 pm PDT Jul 15, 2025
8pm PDT Jul 15, 2025-6pm PDT Jul 22, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database