Showers and Storms in the East; Dangerously Hot and Dry in the West

Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Mist

57°F

14°C

Humidity 93%
Wind Speed NNW 5 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 55°F (13°C)
Visibility 1.50 mi
Last update 09 Aug 06:20 AM PDT
Extended Forecast for

7 Miles SW Lake Berryessa CA

Heat Advisory August 9, 06:42am until August 9, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 9, 06:42am until August 9, 10:00pm

    NOW until 10:00pm Sun

    Heat Advisory

  • Today

    High: 96 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 56. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Patchy fog before 8am.  Otherwise, sunny, with a high near 86. Calm wind becoming south southwest 5 to 7 mph in the morning.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 54. South southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 54 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am.  Otherwise, sunny, with a high near 84. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 53.

    Low: 53 °F

    Clear then
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 9am.  Otherwise, sunny, with a high near 83.

    High: 83 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny and hot, with a high near 96. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tonight
Mostly clear, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming south southwest 5 to 7 mph in the morning.
Monday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 54. South southwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
Patchy fog before 9am. Otherwise, sunny, with a high near 84. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Tuesday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 53.
Wednesday
Patchy fog before 9am. Otherwise, sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 52.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles SW Lake Berryessa CA
 38.51°N 122.34°W (Elev. 699 ft)
1:46 am PDT Aug 9, 2026
6am PDT Aug 9, 2026-6pm PDT Aug 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