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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

64°F

18°C

Humidity 77%
Wind Speed WSW 5 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 Aug 10:20 PM PDT
Extended Forecast for

4 Miles NW Yountville CA

  • Tonight

    Tonight: Partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 92. Light south southeast wind.

    High: 92 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 56. West southwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Increasing
    Clouds

  • Monday

    Monday: Cloudy through mid morning, then gradual clearing, with a high near 88. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 88 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 54. Southwest wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 87.

    High: 87 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89.

    High: 89 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 57. Calm wind.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 92. Light south southeast wind.
Sunday Night
Increasing clouds, with a low around 56. West southwest wind around 5 mph becoming calm in the evening.
Monday
Cloudy through mid morning, then gradual clearing, with a high near 88. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 54. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 87.
Tuesday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 54.
Wednesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
Partly cloudy, with a low around 56.
Friday
Mostly sunny, with a high near 89.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Yountville CA
 38.43°N 122.41°W (Elev. 180 ft)
Last Update:
3:12 pm PDT Aug 22, 2026
Forecast Valid:
10pm PDT Aug 22, 2026-6pm PDT Aug 29, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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Chance of Precipitation