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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

63°F

17°C

Humidity 72%
Wind Speed SW 6 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 27 Aug 10:35 PM PDT
Extended Forecast for

Napa CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of rain before 11am. Cloudy, then becoming mostly sunny during the afternoon, with a high near 77. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 77 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Friday Night

    Friday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 54. South southwest wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 77. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 77 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 53. Southwest wind 5 to 8 mph becoming calm in the evening.

    Low: 53 °F

    Clear then
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, sunny, with a high near 78.

    High: 78 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 60. Calm wind.
Friday
A 20 percent chance of rain before 11am. Cloudy, then becoming mostly sunny during the afternoon, with a high near 77. Calm wind becoming south southwest 5 to 8 mph in the morning.
Friday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 54. South southwest wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 77. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 53. Southwest wind 5 to 8 mph becoming calm in the evening.
Sunday
Patchy fog before 9am. Otherwise, sunny, with a high near 78.
Sunday Night
Mostly clear, with a low around 53.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
Partly sunny, with a high near 71.
Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 52.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 75.
Wednesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 54.
Thursday
Mostly 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:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
Last Update:
8:09 pm PDT Aug 27, 2026
Forecast Valid:
10pm PDT Aug 27, 2026-6pm PDT Sep 3, 2026
 
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