Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

46°F

8°C

Humidity 75%
Wind Speed N 0 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 19 May 06:15 AM PDT
Extended Forecast for

Lake Berryessa CA

  • Today

    Today: Sunny, with a high near 84. North wind 5 to 8 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. Northwest wind around 5 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 58. West southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 58 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 55.

    Low: 55 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 84. North wind 5 to 8 mph.
Tonight
Mostly clear, with a low around 59. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Clear, with a low around 58. West southwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Clear, with a low around 58.
Friday
Sunny, with a high near 86.
Friday Night
Clear, with a low around 55.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 53.
Sunday
Sunny, with a high near 80.
Sunday Night
Mostly clear, with a low around 54.
Memorial Day
Sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Lake Berryessa CA
 38.57°N 122.24°W (Elev. 732 ft)
2:41 am PDT May 19, 2026
6am PDT May 19, 2026-6pm PDT May 25, 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