Severe Weather and Flooding Threats for the Central U.S.; Dangerous Heat in the Southern and Western U.S.

Severe weather and flooding threats will continue for portions of the central U.S. over the next couple of days, with multiple rounds of thunderstorms expected. Dangerous heat will persist across the southern and western U.S. through mid-week. Hot and dry conditions will fuel fire weather concerns for the Intermountain West, where dry thunderstorms may spark additional wildfires. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

52°F

11°C

Humidity 100%
Wind Speed W 4 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 52°F (11°C)
Visibility 7.00 mi
Last update 24 Jun 12:00 AM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Overnight

    Overnight: Widespread fog, mainly after 4am.  Otherwise, partly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Fog

  • Wednesday

    Wednesday: Areas of fog before 8am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 85. Calm wind becoming south around 6 mph in the afternoon.

    High: 85 °F

    Areas Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Widespread fog, mainly after 4am.  Otherwise, increasing clouds, with a low around 51. West southwest wind around 5 mph becoming calm  in the evening.

    Low: 51 °F

    Clear then
    Fog

  • Thursday

    Thursday: Areas of fog before 8am.  Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 86. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 86 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54. Southwest wind around 6 mph becoming calm  in the evening.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 7am.  Otherwise, sunny, with a high near 78.

    High: 78 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

Detailed Forecast

Overnight
Widespread fog, mainly after 4am. Otherwise, partly cloudy, with a low around 50. Calm wind.
Wednesday
Areas of fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 85. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Widespread fog, mainly after 4am. Otherwise, increasing clouds, with a low around 51. West southwest wind around 5 mph becoming calm in the evening.
Thursday
Areas of fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 86. Calm wind becoming southwest around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 54. Southwest wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 81.
Friday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 53.
Saturday
Patchy fog before 7am. Otherwise, sunny, with a high near 78.
Saturday Night
Clear, with a low around 52.
Sunday
Sunny, with a high near 84.
Sunday Night
Clear, with a low around 54.
Monday
Sunny, with a high near 86.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
11:32 pm PDT Jun 23, 2026
12am PDT Jun 24, 2026-6pm PDT Jun 30, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database