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

57°F

14°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 23 Aug 03:20 AM PDT
Extended Forecast for

5 Miles NNW Lake Berryessa CA

  • Overnight

    Overnight: Partly cloudy, with a low around 59. West wind around 6 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 93. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. Southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 89. Calm wind becoming south southwest 5 to 9 mph in the afternoon.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. Southwest wind 6 to 11 mph becoming light west southwest  in the evening.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. West wind around 6 mph.
Sunday
Mostly sunny, with a high near 93. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 58. Southwest wind 5 to 8 mph becoming calm in the evening.
Monday
Sunny, with a high near 89. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Monday Night
Mostly clear, with a low around 57. Southwest wind 6 to 11 mph becoming light west southwest in the evening.
Tuesday
Mostly sunny, with a high near 88.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Sunny, with a high near 91.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 58.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNW Lake Berryessa CA
 38.65°N 122.29°W (Elev. 997 ft)
1:46 am PDT Aug 23, 2026
3am PDT Aug 23, 2026-6pm PDT Aug 29, 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