Extreme Heat in the Southwest; Severe Weather in the Northern Plains; Heavy Rain in the East

Extreme heat continues across the Southwest as temperatures may top 120 degrees. The heat may expand across the West and south-central U.S. into the middle of the month. Severe thunderstorms capable of severe wind gusts and large hail will be the primary hazards today across the northern Plains into the upper Midwest. Rainfall could be locally heavy across the Eastern U.S. today. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

67°F

19°C

Humidity 75%
Wind Speed S 8 MPH
Barometer 29.74 in (1007.11 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 03 Aug 08:54 PM PDT
Extended Forecast for

Napa CA

  • Tonight

    Tonight: Mostly clear, with a low around 58. Light south southwest wind.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Widespread haze before 9am. Sunny, with a high near 89. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 89 °F

    Haze then
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. Southwest wind around 6 mph becoming calm  in the evening.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 84 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. Southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56.

    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 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 58. Light south southwest wind.
Tuesday
Widespread haze before 9am. Sunny, with a high near 89. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 56. Southwest wind around 6 mph becoming calm in the evening.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 55. Southwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 56.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Patchy fog. Otherwise, mostly clear, with a low around 56.
Monday
Patchy fog. Otherwise, mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
1:26 pm PDT Aug 3, 2026
9pm PDT Aug 3, 2026-6pm PDT Aug 10, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database