National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Severe Thunderstorms and Excessive Rainfall; Heat Wave Builds in the Intermountain West and Plains

A slow moving front will bring rounds of strong to severe thunderstorms and heavy rainfall to the central Plains eastward to the east-central U.S.. The first widespread significant heat wave of summer for the Intermountain West and Plains is expected to develop today and expand through next week. Dangerous heat will continue to impact portions of the Southwest and Southeast. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

57°F

14°C

Humidity 87%
Wind Speed WSW 9 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 54°F (12°C)
Visibility 9.00 mi
Last update 10 Jul 09:00 AM PDT
Extended Forecast for

9 Miles SE Lake Berryessa CA

  • Today

    Today: Sunny, with a high near 85. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 85 °F

    Sunny

  • 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

  • Saturday

    Saturday: Mostly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 90 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 62. West southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 90. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 90 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 66.

    Low: 66 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 91.

    High: 91 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 85. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 56. Southwest wind 5 to 8 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 62. West southwest wind 5 to 7 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 90. Calm wind becoming south southwest around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 66.
Monday
Partly sunny, with a high near 91.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Clear, with a low around 64.
Wednesday
Sunny, with a high near 95.
Wednesday Night
Clear, with a low around 61.
Thursday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles SE Lake Berryessa CA
 38.47°N 122.13°W (Elev. 1194 ft)
Last Update:
2:16 am PDT Jul 10, 2026
Forecast Valid:
9am PDT Jul 10, 2026-6pm PDT Jul 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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Chance of Precipitation