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

Strong Storms and Heavy Rainfall Threats; Dangerous Heat for Southern Plains into the Southwest

Thunderstorms, some severe, will impact areas of the Plains into the Midwest today. Rainfall can be locally heavy as well from these storms with isolated instances of flash flooding. Monsoonal flow will enhance rainfall across the Four Corners into the central Rockies today. Meanwhile, summer heat continues for the southern Plains, Southwest into southern California. 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 93%
Wind Speed W 8 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 25 Aug 07:35 AM PDT
Extended Forecast for

9 Miles ESE Lake Berryessa CA

  • Today

    Today: Mostly sunny, with a high near 93. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 93 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 63. West southwest wind 7 to 9 mph.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 95. Calm wind becoming west southwest 5 to 9 mph in the afternoon.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64. West wind 8 to 13 mph becoming light in the evening.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 95. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 95 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 93. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Tonight
Partly cloudy, with a low around 63. West southwest wind 7 to 9 mph.
Wednesday
Sunny, with a high near 95. Calm wind becoming west southwest 5 to 9 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 64. West wind 8 to 13 mph becoming light in the evening.
Thursday
Sunny, with a high near 95. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 88.
Saturday Night
Clear, with a low around 58.
Sunday
Sunny, with a high near 86.
Sunday Night
Clear, with a low around 56.
Monday
Sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles ESE Lake Berryessa CA
 38.5°N 122.11°W (Elev. 594 ft)
Last Update:
2:01 am PDT Aug 25, 2026
Forecast Valid:
7am PDT Aug 25, 2026-6pm PDT Aug 31, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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