Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

66°F

19°C

Humidity 72%
Wind Speed SSW 4 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 27 Aug 09:00 AM PDT
Extended Forecast for

9 Miles SE Lake Berryessa CA

  • Today

    Today: Mostly sunny, with a high near 95. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 95 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 65. Southwest wind 5 to 8 mph.

    Low: 65 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers before 11am.  Mostly cloudy, with a high near 85. Southwest wind 5 to 10 mph.

    High: 85 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 57. Southwest wind 8 to 13 mph becoming light  in the evening.

    Low: 57 °F

    Gradual
    Clearing

  • Saturday

    Saturday: Sunny, with a high near 85. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 54.

    Low: 54 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 95. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 65. Southwest wind 5 to 8 mph.
Friday
A 20 percent chance of showers before 11am. Mostly cloudy, with a high near 85. Southwest wind 5 to 10 mph.
Friday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 57. Southwest wind 8 to 13 mph becoming light in the evening.
Saturday
Sunny, with a high near 85. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Saturday Night
Clear, with a low around 56.
Sunday
Sunny, with a high near 84.
Sunday Night
Clear, with a low around 54.
Monday
Sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles SE Lake Berryessa CA
 38.5°N 122.14°W (Elev. 948 ft)
6:47 am PDT Aug 27, 2026
9am PDT Aug 27, 2026-6pm PDT Sep 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database