Showers and Storms in the East; Dangerously Hot and Dry in the West

Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

75°F

24°C

Humidity 53%
Wind Speed SSW 16 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 06 Aug 04:20 PM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Tonight

    Tonight: Patchy fog after 2am.  Otherwise, increasing clouds, with a low around 53. Light and variable wind.

    Low: 53 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am.  Otherwise, partly sunny, then gradually becoming sunny and hot, with a high near 96. Calm wind becoming south around 5 mph in the afternoon.

    High: 96 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 56. Calm wind.

    Low: 56 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 101. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 101 °F

    Hot

  • Saturday Night

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

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 54.

    Low: 54 °F

    Clear then
    Patchy Fog

  • Monday

    Monday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 91.

    High: 91 °F

    Areas Fog
    then Sunny

  • Monday Night

    Monday Night: Areas of fog after 1am.  Otherwise, mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear
    then Areas
    Fog

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 53. Light and variable wind.
Friday
Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny and hot, with a high near 96. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Increasing clouds, with a low around 56. Calm wind.
Saturday
Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 101. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 57. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny and hot, with a high near 99.
Sunday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 54.
Monday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 91.
Monday Night
Areas of fog after 1am. Otherwise, mostly clear, with a low around 52.
Tuesday
Areas of fog before 9am. Otherwise, sunny, with a high near 89.
Tuesday Night
Patchy fog. Otherwise, mostly clear, with a low around 53.
Wednesday
Areas of fog. Otherwise, mostly sunny, with a high near 90.
Wednesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 52.
Thursday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
3:18 pm PDT Aug 6, 2026
4pm PDT Aug 6, 2026-6pm PDT Aug 13, 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