Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. 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 72%
Wind Speed SW 11 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 24 Jul 08:54 PM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Tonight

    Tonight: Increasing clouds, with a low around 54. Light southwest wind.

    Low: 54 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 88 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 53. West wind around 5 mph becoming calm  in the evening.

    Low: 53 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Patchy fog before 7am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 89. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 89 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53. West southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 53 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 55.

    Low: 55 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 54. Light southwest wind.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Saturday Night
Increasing clouds, with a low around 53. West wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 7am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 89. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 53. West southwest wind 5 to 7 mph becoming calm in the evening.
Monday
Sunny, with a high near 92.
Monday Night
Clear, with a low around 55.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Clear, with a low around 56.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Clear, with a low around 55.
Thursday
Sunny, with a high near 94.
Thursday Night
Mostly clear, with a low around 56.
Friday
Sunny and hot, with a high near 96.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
8:31 pm PDT Jul 24, 2026
9pm PDT Jul 24, 2026-6pm PDT Jul 31, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database