Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. 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 82%
Wind Speed N 0 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 27 Aug 05:00 AM PDT
Extended Forecast for

Yountville CA

  • Overnight

    Overnight: A 20 percent chance of rain.  Partly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: A 20 percent chance of rain.  Mostly sunny, with a high near 92. Calm wind becoming southeast 5 to 9 mph in the afternoon.

    High: 92 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain.  Mostly cloudy, with a low around 60. East southeast wind around 5 mph becoming calm  in the evening.

    Low: 60 °F

    Slight Chance
    Rain

  • Friday

    Friday: A 20 percent chance of rain before 11am.  Cloudy, with a high near 83. Southeast wind 3 to 7 mph.

    High: 83 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday Night

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

    Low: 51 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 83.

    High: 83 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after midnight.  Otherwise, mostly clear, with a low around 51.

    Low: 51 °F

    Clear then
    Patchy Fog

  • Sunday

    Sunday: Areas of fog before 10am.  Otherwise, mostly sunny, with a high near 81.

    High: 81 °F

    Areas Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 11pm.  Otherwise, mostly clear, with a low around 50.

    Low: 50 °F

    Patchy Fog

Detailed Forecast

Overnight
A 20 percent chance of rain. Partly cloudy, with a low around 60. Calm wind.
Thursday
A 20 percent chance of rain. Mostly sunny, with a high near 92. Calm wind becoming southeast 5 to 9 mph in the afternoon.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 60. East southeast wind around 5 mph becoming calm in the evening.
Friday
A 20 percent chance of rain before 11am. Cloudy, with a high near 83. Southeast wind 3 to 7 mph.
Friday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 51. West southwest wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 83.
Saturday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 51.
Sunday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 81.
Sunday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 50.
Monday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 74.
Monday Night
Patchy fog. Otherwise, partly cloudy, with a low around 48.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 77.
Tuesday Night
Areas of fog. Otherwise, mostly clear, with a low around 50.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Yountville CA
 38.39°N 122.37°W (Elev. 558 ft)
2:57 am PDT Aug 27, 2026
5am PDT Aug 27, 2026-6pm PDT Sep 2, 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