Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that 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.

Overcast

55°F

13°C

Humidity 93%
Wind Speed WNW 9 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 Aug 02:55 AM PDT
Extended Forecast for

2 Miles NNW Vallejo CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 57. Southwest wind around 8 mph.

    Low: 57 °F

    Mostly Cloudy

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 75. Southwest wind 8 to 10 mph.

    High: 75 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 57. West southwest wind around 9 mph.

    Low: 57 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 75. West southwest wind 8 to 13 mph, with gusts as high as 18 mph.

    High: 75 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. West southwest wind 7 to 11 mph, with gusts as high as 18 mph.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 57. Southwest wind around 8 mph.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 75. Southwest wind 8 to 10 mph.
Thursday Night
Mostly cloudy, with a low around 57. West southwest wind around 9 mph.
Friday
Partly sunny, with a high near 75. West southwest wind 8 to 13 mph, with gusts as high as 18 mph.
Friday Night
Partly cloudy, with a low around 56. West southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Partly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Partly sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
Partly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Vallejo CA
 38.18°N 122.26°W (Elev. 56 ft)
2:16 am PDT Aug 20, 2026
3am PDT Aug 20, 2026-6pm PDT Aug 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database