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

Significant Heat in the Northwest U.S.; Tropical Rainfall Potential in the Southwest U.S.

A significant late season heat wave continues in the interior Pacific Northwest for at least one more day before easing somewhat Friday into Saturday. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring a marginal to slight risk of excessive rainfall across the southwest U.S. through Saturday which may bring areas of flooding. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

56°F

13°C

Humidity 96%
Wind Speed WSW 5 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 04 Sep 05:54 AM PDT
Extended Forecast for

Yountville CA

  • Today

    Today: Areas of fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 84. Calm wind becoming south around 6 mph in the morning.

    High: 84 °F

    Areas Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 10pm. Otherwise, increasing clouds, with a low around 53. Calm wind.

    Low: 53 °F

    Patchy Fog

  • Friday

    Friday: Areas of fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 82. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 82 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 54. Light southwest wind.

    Low: 54 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 82. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of rain. Partly sunny, with a high near 80.

    High: 80 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Areas of fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 84. Calm wind becoming south around 6 mph in the morning.
Tonight
Patchy fog after 10pm. Otherwise, increasing clouds, with a low around 53. Calm wind.
Friday
Areas of fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 82. Calm wind becoming southwest around 6 mph in the afternoon.
Friday Night
Increasing clouds, with a low around 54. Light southwest wind.
Saturday
Mostly sunny, with a high near 82. Calm wind becoming west southwest around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 55.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 55.
Monday
A slight chance of rain. Partly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
A slight chance of rain. Partly sunny, with a high near 78.
Tuesday Night
A slight chance of rain. Partly cloudy, with a low around 54.
Wednesday
A chance of rain. Partly sunny, with a high near 77.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Yountville CA
 38.39°N 122.37°W (Elev. 558 ft)
Last Update:
2:39 am PDT Sep 4, 2025
Forecast Valid:
6am PDT Sep 4, 2025-6pm PDT Sep 10, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation