National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

73°F

23°C

Humidity 49%
Wind Speed S 10 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 29 Jun 12:00 PM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. East wind around 6 mph becoming west southwest.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. West wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51. South southwest wind around 6 mph becoming calm in the evening.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 50.

    Low: 50 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 86.

    High: 86 °F

    Patchy Fog
    then Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 87. East wind around 6 mph becoming west southwest.
Tonight
Mostly clear, with a low around 55. West wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 85. Calm wind becoming south 5 to 7 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 51. South southwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 50.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 86.
Friday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 53.
Independence Day
Patchy fog. Otherwise, sunny, with a high near 88.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 53.
Sunday
Areas of fog. Otherwise, mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
Last Update:
11:26 am PDT Jun 29, 2026
Forecast Valid:
12pm PDT Jun 29, 2026-6pm PDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation