Extreme Heat Across the Southern U.S.; Flash Flooding Threats in the Mid-Atlantic, Northeast, and Four Corners Region

Dangerous and extreme heat will remain across portions of the southern U.S. this week. Heavy rainfall may bring significant flash flooding across portions of the Mid-Atlantic and Northeast through the night, and additional flash flooding concerns across New England on Wednesday. Monsoonal thunderstorms will bring a flash flood risk to the Four Corners region, especially in burn scar areas Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

79°F

26°C

Humidity 50%
Wind Speed S 17 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 28 Jul 05:35 PM PDT
Extended Forecast for

Napa CA

  • Tonight

    Tonight: Mostly clear, with a low around 56. Southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Patchy fog before 8am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 86. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 56. Southwest wind around 6 mph becoming calm  in the evening.

    Low: 56 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 86. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 86 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. Southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Saturday Night

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

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 56. Southwest wind 5 to 8 mph becoming calm in the evening.
Wednesday
Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 86. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 56. Southwest wind around 6 mph becoming calm in the evening.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 86. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 56. Southwest wind 5 to 8 mph becoming calm in the evening.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 92.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Sunny, with a high near 90.
Sunday Night
Mostly clear, with a low around 58.
Monday
Sunny, with a high near 87.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
1:26 pm PDT Jul 28, 2026
5pm PDT Jul 28, 2026-6pm PDT Aug 4, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database