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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

70°F

21°C

Humidity 64%
Wind Speed S 8 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 Aug 07:35 PM PDT
Extended Forecast for

3 Miles S Lake Berryessa CA

  • Tonight

    Tonight: Mostly clear, with a low around 62. West southwest wind 5 to 9 mph becoming light northwest after midnight. Winds could gust as high as 18 mph.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 94. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 94 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 60. West southwest wind 5 to 7 mph.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 90. Southwest wind 3 to 8 mph.

    High: 90 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. West southwest wind 5 to 8 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 62. West southwest wind 5 to 9 mph becoming light northwest after midnight. Winds could gust as high as 18 mph.
Sunday
Mostly sunny, with a high near 94. Calm wind becoming south southwest around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 60. West southwest wind 5 to 7 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 90. Southwest wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 58. West southwest wind 5 to 8 mph.
Tuesday
Mostly sunny, with a high near 89.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 60.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Lake Berryessa CA
 38.53°N 122.23°W (Elev. 991 ft)
Last Update:
3:12 pm PDT Aug 22, 2026
Forecast Valid:
7pm PDT Aug 22, 2026-6pm PDT Aug 29, 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

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation