Heat Persists in the South Central U.S. and Southwest; Heavy rains in the Desert Southwest and Central Plains

Sweltering heat remains across the South-Central Plains, Lower/Middle Mississippi Valley, and the Southwest this week with limited nighttime relief. Thunderstorms will bring heavy rainfall leading to localized flash flooding in portions of the Desert Southwest and central Plains. Isolated strong to severe thunderstorms are possible across portions of the central Plains into the Northeast. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

64°F

18°C

Humidity 63%
Wind Speed N 0 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 09 Sep 04:00 AM PDT
Extended Forecast for

2 Miles E Lake Berryessa CA

Heat Advisory September 9, 04:19am until September 10, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 9, 04:19am until September 10, 10:00pm

    NOW until 10:00pm Thu

    Heat Advisory

  • Today

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 93. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 93 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. West southwest wind 5 to 7 mph becoming calm  in the evening. Winds could gust as high as 18 mph.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 95. Light north northwest wind.
Tonight
Partly cloudy, with a low around 73. Calm wind.
Thursday
Mostly sunny, with a high near 93. Calm wind becoming west southwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 63. West southwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Friday
Sunny, with a high near 87. Calm wind becoming southwest around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 81.
Sunday Night
Clear, with a low around 60.
Monday
Sunny, with a high near 83.
Monday Night
Clear, with a low around 59.
Tuesday
Sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E Lake Berryessa CA
 38.57°N 122.21°W (Elev. 440 ft)
3:16 am PDT Sep 9, 2026
4am PDT Sep 9, 2026-6pm PDT Sep 15, 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