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

77°F

25°C

Humidity 44%
Wind Speed WSW 16 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 21 Aug 05:35 PM PDT
Extended Forecast for

3 Miles NNW Vallejo CA

  • Tonight

    Tonight: Mostly clear, with a low around 56. West southwest wind 6 to 10 mph.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79. Southwest wind 6 to 11 mph.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 57. West southwest wind 5 to 9 mph.

    Low: 57 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 77. Light west southwest wind becoming southwest 5 to 9 mph in the morning.

    High: 77 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 57. Southwest wind 7 to 9 mph.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Monday Night

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

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

  • Tuesday Night

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

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 56. West southwest wind 6 to 10 mph.
Saturday
Sunny, with a high near 79. Southwest wind 6 to 11 mph.
Saturday Night
Increasing clouds, with a low around 57. West southwest wind 5 to 9 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 77. Light west southwest wind becoming southwest 5 to 9 mph in the morning.
Sunday Night
Partly cloudy, with a low around 57. Southwest wind 7 to 9 mph.
Monday
Mostly 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
Mostly sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Mostly clear, with a low around 57.
Friday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Vallejo CA
 38.18°N 122.26°W (Elev. 56 ft)
1:47 pm PDT Aug 21, 2026
5pm PDT Aug 21, 2026-6pm PDT Aug 28, 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