Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. 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 93%
Wind Speed S 16 MPH
Barometer 29.84 in (1010.5 mb)
Dewpoint 54°F (12°C)
Visibility 9.00 mi
Last update 30 Jun 11:54 PM PDT
Extended Forecast for

Sonoma CA

  • Overnight

    Overnight: Widespread fog, mainly after 3am.  Otherwise, partly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Fog

  • Wednesday

    Wednesday: Widespread fog, mainly before 7am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 82. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 82 °F

    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 1am.  Otherwise, increasing clouds, with a low around 49. Southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 49 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Areas of fog before 9am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 78. Calm wind becoming south 5 to 8 mph in the morning.

    High: 78 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after midnight.  Otherwise, mostly clear, with a low around 49. South southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 49 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 82.

    High: 82 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 52.

    Low: 52 °F

    Clear then
    Patchy Fog

  • Independence Day

    Independence Day: Areas of fog before 8am.  Otherwise, sunny, with a high near 83.

    High: 83 °F

    Areas Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear
    then Patchy
    Fog

Detailed Forecast

Overnight
Widespread fog, mainly after 3am. Otherwise, partly cloudy, with a low around 49. Calm wind.
Wednesday
Widespread fog, mainly before 7am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 82. Calm wind becoming south 5 to 9 mph in the afternoon.
Wednesday Night
Patchy fog after 1am. Otherwise, increasing clouds, with a low around 49. Southwest wind 5 to 7 mph becoming calm in the evening.
Thursday
Areas of fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 78. Calm wind becoming south 5 to 8 mph in the morning.
Thursday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 49. South southwest wind 5 to 8 mph becoming calm in the evening.
Friday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 82.
Friday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 52.
Independence Day
Areas of fog before 8am. Otherwise, sunny, with a high near 83.
Saturday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 52.
Sunday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80.
Sunday Night
Patchy fog. Otherwise, mostly clear, with a low around 51.
Monday
Patchy fog. Otherwise, mostly sunny, with a high near 79.
Monday Night
Patchy fog. Otherwise, mostly clear, with a low around 50.
Tuesday
Areas of fog. Otherwise, mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.43°W (Elev. 95 ft)
11:27 pm PDT Jun 30, 2026
12am PDT Jul 1, 2026-6pm PDT Jul 7, 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