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

70°F

21°C

Humidity 64%
Wind Speed S 5 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 27 Aug 08:20 PM PDT
Extended Forecast for

Sonoma CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of rain before 11am. Partly sunny, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 82 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Friday Night

    Friday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 51. West southwest wind around 5 mph becoming calm in the evening.

    Low: 51 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 82. Light southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 82 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 3am. Otherwise, clear, with a low around 50. West southwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 50 °F

    Clear then
    Patchy Fog

  • Sunday

    Sunday: Areas of fog before 9am. Otherwise, sunny, with a high near 83.

    High: 83 °F

    Areas Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 50.

    Low: 50 °F

    Clear then
    Patchy Fog

  • Monday

    Monday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 59. Calm wind.
Friday
A 20 percent chance of rain before 11am. Partly sunny, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the morning.
Friday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 51. West southwest wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 82. Light southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Patchy fog after 3am. Otherwise, clear, with a low around 50. West southwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Sunday
Areas of fog before 9am. Otherwise, sunny, with a high near 83.
Sunday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 50.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Patchy fog. Otherwise, mostly clear, with a low around 50.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 79.
Wednesday Night
Patchy fog. Otherwise, mostly clear, with a low around 52.
Thursday
Patchy fog. Otherwise, mostly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
Last Update:
8:09 pm PDT Aug 27, 2026
Forecast Valid:
8pm 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