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

64°F

18°C

Humidity 77%
Wind Speed S 9 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 28 Aug 10:35 AM PDT
Extended Forecast for

Sonoma CASimilar City Names

  • Today

    Today: A 20 percent chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 82. West southwest wind 3 to 7 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 82 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Patchy fog between 2am and 4am. Otherwise, mostly clear, with a low around 51. Southwest wind 5 to 8 mph becoming calm in the evening.

    Low: 51 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Sunny, with a high near 83. Light and variable wind becoming west southwest 6 to 11 mph in the afternoon.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy fog between 2am and 5am. Otherwise, increasing clouds, with a low around 50. West southwest wind 5 to 9 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog between 8am and 9am. Otherwise, sunny, with a high near 84. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Sunday Night

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

    Low: 50 °F

    Clear then
    Patchy Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 76.

    High: 76 °F

    Patchy Fog
    then Sunny

  • Monday Night

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

    Low: 50 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 76.

    High: 76 °F

    Partly Sunny

Detailed Forecast

Today
A 20 percent chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 82. West southwest wind 3 to 7 mph. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Patchy fog between 2am and 4am. Otherwise, mostly clear, with a low around 51. Southwest wind 5 to 8 mph becoming calm in the evening.
Saturday
Sunny, with a high near 83. Light and variable wind becoming west southwest 6 to 11 mph in the afternoon.
Saturday Night
Patchy fog between 2am and 5am. Otherwise, increasing clouds, with a low around 50. West southwest wind 5 to 9 mph becoming calm in the evening.
Sunday
Patchy fog between 8am and 9am. Otherwise, sunny, with a high near 84. Calm wind becoming south 5 to 7 mph in the afternoon.
Sunday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 50.
Monday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Partly sunny, with a high near 76.
Tuesday Night
Patchy fog after 2am. 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 51.
Thursday
Patchy fog. Otherwise, mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CASimilar City Names
 38.29°N 122.46°W (Elev. 72 ft)
Last Update:
9:42 am PDT Aug 28, 2026
Forecast Valid:
10am PDT Aug 28, 2026-6pm PDT Sep 3, 2026
 
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Additional Resources

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