Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Partly Cloudy

59°F

15°C

Humidity 93%
Wind Speed SSW 8 MPH
Barometer 29.8 in (1009.14 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 04 Aug 05:36 AM PDT
Extended Forecast for

4 Miles WSW Yountville CA

  • Today

    Today: Widespread haze between 7am and 8am. Sunny, with a high near 95. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 95 °F

    Haze then
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. West wind around 5 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Light south southwest wind.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 57. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 57 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Calm wind.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

Detailed Forecast

Today
Widespread haze between 7am and 8am. Sunny, with a high near 95. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 59. West wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 92. Light south southwest wind.
Wednesday Night
Clear, with a low around 57. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 91. Calm wind.
Thursday Night
Mostly clear, with a low around 58.
Friday
Sunny and hot, with a high near 96.
Friday Night
Clear, with a low around 61.
Saturday
Sunny, with a high near 95.
Saturday Night
Clear, with a low around 63.
Sunday
Sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 59.
Monday
Sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Yountville CA
 38.38°N 122.42°W (Elev. 1030 ft)
5:16 am PDT Aug 4, 2026
5am PDT Aug 4, 2026-6pm PDT Aug 10, 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