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

Severe thunderstorms are possible from the Ohio Valley to the central Plains this evening, and the threat will expand into 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 Alaska through this evening and for 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.

Clear

71°F

22°C

Humidity 63%
Wind Speed SSW 9 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 58°F (14°C)
Visibility 7.00 mi
Last update 21 Jun 01:54 PM PDT
Extended Forecast for

6 Miles E Saint Helena CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. South wind around 7 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 51. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 51 °F

    Clear then
    Patchy Fog

  • Monday

    Monday: Areas of fog before 8am.  Otherwise, sunny, with a high near 86. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 86 °F

    Areas Fog
    then Sunny

  • Monday Night

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

    Low: 52 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 7am.  Otherwise, sunny, with a high near 88. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 52.

    Low: 52 °F

    Clear then
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 7am.  Otherwise, sunny, with a high near 89.

    High: 89 °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

Detailed Forecast

This Afternoon
Sunny, with a high near 84. South wind around 7 mph.
Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 51. Southwest wind around 5 mph becoming calm in the evening.
Monday
Areas of fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Monday Night
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 52. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Patchy fog before 7am. Otherwise, sunny, with a high near 88. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Tuesday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 52.
Wednesday
Patchy fog before 7am. Otherwise, sunny, with a high near 89.
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
Sunny, with a high near 84.
Friday Night
Patchy fog. Otherwise, mostly clear, with a low around 54.
Saturday
Patchy fog. Otherwise, sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles E Saint Helena CA
 38.48°N 122.36°W (Elev. 499 ft)
1:26 pm PDT Jun 21, 2026
2pm PDT Jun 21, 2026-6pm PDT Jun 27, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database