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

Fire Weather Concerns and Severe Thunderstorms through the Weekend

Dry and windy conditions, and some dry thunderstorms and lightning, may support hazardous fire activity in the northern Plains, high southern Plains and the Southwest this weekend. An active severe weather pattern is forecast for portions of the central and southern High Plains into the Upper Midwest through early the part of next week. Damaging winds, large hail, and tornadoes are possible. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

55°F

13°C

Humidity 71%
Wind Speed NW 8 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 15 May 11:20 PM PDT
Extended Forecast for

Lake Berryessa CA

  • Tonight

    Tonight: Mostly clear, with a low around 56. West northwest wind 7 to 9 mph, with gusts as high as 18 mph.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78. North northwest wind 6 to 8 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. Northwest wind 8 to 15 mph, with gusts as high as 29 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74. North wind 15 to 17 mph, with gusts as high as 33 mph.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 59. North wind 15 to 17 mph, with gusts as high as 36 mph.

    Low: 59 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 56. West northwest wind 7 to 9 mph, with gusts as high as 18 mph.
Saturday
Sunny, with a high near 78. North northwest wind 6 to 8 mph.
Saturday Night
Mostly clear, with a low around 56. Northwest wind 8 to 15 mph, with gusts as high as 29 mph.
Sunday
Sunny, with a high near 74. North wind 15 to 17 mph, with gusts as high as 33 mph.
Sunday Night
Clear, with a low around 59. North wind 15 to 17 mph, with gusts as high as 36 mph.
Monday
Sunny, with a high near 82.
Monday Night
Clear, with a low around 58.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Clear, with a low around 59.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Clear, with a low around 59.
Thursday
Sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Berryessa CA
 38.57°N 122.24°W (Elev. 732 ft)
Last Update:
11:27 pm PDT May 15, 2026
Forecast Valid:
11pm PDT May 15, 2026-6pm PDT May 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation