Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Mostly Cloudy

59°F

15°C

Humidity 89%
Wind Speed SW 8 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 18 Aug 11:39 PM PDT
Extended Forecast for

Napa CA

  • Tonight

    Tonight: Increasing clouds, with a low around 56. South southwest wind around 5 mph becoming calm  after midnight.

    Low: 56 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 82. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 82 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 57. South southwest wind around 6 mph becoming calm  after midnight.

    Low: 57 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 80. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 80 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 57. West southwest wind 3 to 8 mph.

    Low: 57 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 56. South southwest wind around 5 mph becoming calm after midnight.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 82. Calm wind becoming south southwest 5 to 8 mph in the morning.
Wednesday Night
Increasing clouds, with a low around 57. South southwest wind around 6 mph becoming calm after midnight.
Thursday
Partly sunny, with a high near 80. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 57. West southwest wind 3 to 8 mph.
Friday
Partly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Partly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Partly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.27°N 122.28°W (Elev. 3 ft)
11:27 pm PDT Aug 18, 2026
11pm PDT Aug 18, 2026-6pm PDT Aug 25, 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