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

A frontal boundary will bring scattered showers and storms to portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Intermountain West and expand into the Central U.S. by early next week. Elevated wildfire conditions will develop across portions of the Northern/Central Plains and air quality issues will persist in the Northwest. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

57°F

14°C

Humidity 87%
Wind Speed W 10 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 05 Aug 11:55 PM PDT
Extended Forecast for

3 Miles E Saint Helena CA

  • Overnight

    Overnight: Patchy fog.  Otherwise, increasing clouds, with a low around 51. Calm wind.

    Low: 51 °F

    Patchy Fog

  • Thursday

    Thursday: Areas of fog before 9am.  Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.

    High: 92 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 2am.  Otherwise, increasing clouds, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

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

    High: 96 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Saturday Night

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

    Low: 58 °F

    Mostly Clear

  • Sunday

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

    High: 98 °F

    Hot

  • Sunday Night

    Sunday Night: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 55.

    Low: 55 °F

    Clear then
    Patchy Fog

Detailed Forecast

Overnight
Patchy fog. Otherwise, increasing clouds, with a low around 51. Calm wind.
Thursday
Areas of fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 53. Calm wind.
Friday
Areas of fog before 8am. Otherwise, partly sunny, then gradually becoming 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 56. Southwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny and hot, with a high near 100.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Sunny and hot, with a high near 98.
Sunday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 55.
Monday
Areas of fog before 8am. Otherwise, mostly sunny, with a high near 91.
Monday Night
Patchy fog. Otherwise, mostly clear, with a low around 53.
Tuesday
Areas of fog. Otherwise, mostly sunny, with a high near 90.
Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 53.
Wednesday
Areas of fog. Otherwise, mostly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
11:32 pm PDT Aug 5, 2026
12am PDT Aug 6, 2026-6pm PDT Aug 12, 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