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

Extreme Heat Continues; Severe Thunderstorms into Upper Midwest; Strong Bering Sea Storm

Wildfires and poor air quality continue for the Pacific Northwest, Rockies and extended into the Plains. Severe thunderstorms possible for the northern Plains and upper Midwest on Monday along a frontal boundary. Another boundary will focus showers and thunderstorms for the eastern seaboard with localized heavy rainfall possible. For Alaska, a strong Bering Sea storm will bring winds and rainfall. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

61°F

16°C

Humidity 82%
Wind Speed N 0 MPH
Barometer 29.77 in (1008.13 mb)
Dewpoint 55°F (13°C)
Visibility 9.00 mi
Last update 03 Aug 02:35 AM PDT
Extended Forecast for

4 Miles NW Lake Berryessa CA

Heat Advisory August 3, 10:00am until August 3, 10:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Patchy smoke after 3am. Clear, with a low around 66. Calm wind.

    Low: 66 °F

    Patchy Smoke

  • Monday

    Monday: Sunny and hot, with a high near 102. Light and variable wind becoming northeast 5 to 7 mph in the morning.

    High: 102 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 64. Southwest wind around 6 mph becoming calm in the evening.

    Low: 64 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 60. West southwest wind 3 to 8 mph.

    Low: 60 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

Detailed Forecast

Overnight
Patchy smoke after 3am. Clear, with a low around 66. Calm wind.
Monday
Sunny and hot, with a high near 102. Light and variable wind becoming northeast 5 to 7 mph in the morning.
Monday Night
Clear, with a low around 64. Southwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny and hot, with a high near 100. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Tuesday Night
Clear, with a low around 60. West southwest wind 3 to 8 mph.
Wednesday
Sunny, with a high near 95.
Wednesday Night
Clear, with a low around 59.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
Clear, with a low around 62.
Friday
Sunny and hot, with a high near 100.
Friday Night
Clear, with a low around 65.
Saturday
Sunny and hot, with a high near 100.
Saturday Night
Clear, with a low around 63.
Sunday
Sunny, with a high near 94.
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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:
2:41 am PDT Aug 3, 2026
Forecast Valid:
2am PDT Aug 3, 2026-6pm PDT Aug 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation