Severe Weather Possible from the Central Plains to the Northeast; Building Heat in the West; Fire Weather Concerns for the Southwest

Severe thunderstorms will be possible from the central Plains to the Mid-Atlantic and Northeast on Monday. Hazardous heat will linger across the southern U.S. and build across the West through mid-week. Hot and dry conditions will fuel fire weather concerns for Interior Alaska and the Four Corners region through Monday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

55°F

13°C

Humidity 87%
Wind Speed WSW 5 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 52°F (11°C)
Visibility 7.00 mi
Last update 22 Jun 06:20 AM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Today

    Today: Areas of fog before 7am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.

    High: 86 °F

    Areas Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 2am.  Otherwise, increasing clouds, with a low around 51. West southwest wind around 5 mph becoming calm  in the evening.

    Low: 51 °F

    Clear then
    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 7am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 88 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 52. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 52 °F

    Clear then
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 7am.  Otherwise, sunny, with a high near 88. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 52.

    Low: 52 °F

    Clear then
    Patchy Fog

  • Thursday

    Thursday: Areas of fog before 8am.  Otherwise, sunny, with a high near 87.

    High: 87 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Areas of fog before 7am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.
Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 51. West southwest wind around 5 mph becoming calm in the evening.
Tuesday
Areas of fog before 7am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 52. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Patchy fog before 7am. Otherwise, sunny, with a high near 88. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 52.
Thursday
Areas of fog before 8am. Otherwise, sunny, with a high near 87.
Thursday Night
Mostly clear, with a low around 53.
Friday
Mostly sunny, with a high near 83.
Friday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 53.
Saturday
Areas of fog. Otherwise, sunny, with a high near 83.
Saturday Night
Clear, with a low around 53.
Sunday
Sunny, with a high near 87.
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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 Jun 22, 2026
6am PDT Jun 22, 2026-6pm PDT Jun 28, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database