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

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

63°F

17°C

Humidity 72%
Wind Speed W 8 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 16 Jun 10:00 AM PDT
Extended Forecast for

4 Miles NW Lake Berryessa CA

  • Today

    Today: Sunny, with a high near 91. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. Southwest wind 5 to 8 mph becoming calm after midnight.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 54. Southwest wind 5 to 9 mph becoming light after midnight.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 82. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Clear
    then Patchy
    Fog

  • Juneteenth

    Juneteenth: Patchy fog before 8am. Otherwise, sunny, with a high near 76.

    High: 76 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, sunny, with a high near 80.

    High: 80 °F

    Patchy Fog
    then Sunny

Detailed Forecast

Today
Sunny, with a high near 91. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Tonight
Mostly clear, with a low around 55. Southwest wind 5 to 8 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 87. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 54. Southwest wind 5 to 9 mph becoming light after midnight.
Thursday
Sunny, with a high near 82. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 52.
Juneteenth
Patchy fog before 8am. Otherwise, sunny, with a high near 76.
Friday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 51.
Saturday
Patchy fog before 8am. Otherwise, sunny, with a high near 80.
Saturday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 52.
Sunday
Areas of fog. Otherwise, sunny, with a high near 86.
Sunday Night
Patchy fog. Otherwise, clear, with a low around 54.
Monday
Patchy fog. Otherwise, sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Lake Berryessa CA
 38.63°N 122.31°W (Elev. 997 ft)
Last Update:
10:16 am PDT Jun 16, 2026
Forecast Valid:
10am PDT Jun 16, 2026-6pm PDT Jun 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

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Chance of Precipitation