Extreme Heat Across the Southern U.S.; Flash Flooding Threats in the Mid-Atlantic, Northeast, and Four Corners Region

Dangerous and extreme heat will remain across portions of the southern U.S. this week. Heavy rainfall may bring significant flash flooding across portions of the Mid-Atlantic and Northeast through the night, and additional flash flooding concerns across New England on Wednesday. Monsoonal thunderstorms will bring a flash flood risk to the Four Corners region, especially in burn scar areas Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

61°F

16°C

Humidity 87%
Wind Speed SW 11 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 29 Jul 04:00 AM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 93. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 93 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. Light and variable wind.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 94. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 94 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 96. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 96 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 93. Calm wind becoming south southwest around 6 mph in the afternoon.
Tonight
Mostly clear, with a low around 56. Light and variable wind.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 94. Calm wind becoming south southwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 57. Southwest wind around 5 mph becoming calm in the evening.
Friday
Sunny and hot, with a high near 96. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny and hot, with a high near 98.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
Mostly clear, with a low around 59.
Monday
Sunny and hot, with a high near 96.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 95.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
1:26 am PDT Jul 29, 2026
4am PDT Jul 29, 2026-6pm PDT Aug 4, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database