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

Tropical Moisture Brings Slight Risk of Excessive Rainfall to the Southwest; Strong to Locally Severe Storms on the Plains

Heavy rain and flash flooding are possible across portions of the Southwest through Friday, where Flood Watches are in effect. Strong to locally severe thunderstorms are possible today across portions of the Plains. A tropical wave is causing heavy rainfall in Puerto Rico and the Virgin Islands, which may cause urban and small stream flooding and landslides today. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

66°F

19°C

Humidity 78%
Wind Speed SSW 8 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 18 Sep 08:54 AM PDT
Extended Forecast for

5 Miles NE Yountville CA

  • Today

    Today: Partly sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 80 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Mostly cloudy, with a low around 58. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 11am. Partly sunny, with a high near 74. Calm wind becoming south around 6 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 74 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. South southwest wind around 6 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the afternoon.
Tonight
A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Mostly cloudy, with a low around 58. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 20 percent chance of showers before 11am. Partly sunny, with a high near 74. Calm wind becoming south around 6 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Mostly clear, with a low around 58. South southwest wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 79. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Saturday Night
Clear, with a low around 58.
Sunday
Sunny, with a high near 83.
Sunday Night
Clear, with a low around 62.
Monday
Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 61.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 78.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 59.
Wednesday
Mostly sunny, with a high near 74.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NE Yountville CA
 38.45°N 122.3°W (Elev. 1207 ft)
Last Update:
7:55 am PDT Sep 18, 2025
Forecast Valid:
9am PDT Sep 18, 2025-6pm PDT Sep 24, 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