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

Napa, Napa County Airport (KAPC)

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

Clear

61°F

16°C

Humidity 72%
Wind Speed WSW 16 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 15 Apr 06:00 PM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Tonight

    Tonight: Patchy fog between 2am and 3am. Otherwise, mostly clear, with a low around 40. West wind 5 to 8 mph becoming calm in the evening.

    Low: 40 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Sunny, with a high near 68. North wind 5 to 11 mph, with gusts as high as 26 mph.

    High: 68 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 46. North wind around 8 mph, with gusts as high as 24 mph.

    Low: 46 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 74. North wind around 7 mph, with gusts as high as 23 mph.

    High: 74 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43. Light north northwest wind.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain. Partly sunny, with a high near 69.

    High: 69 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A chance of rain. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 46.

    Low: 46 °F

    Chance Rain
    and Patchy
    Fog

Detailed Forecast

Tonight
Patchy fog between 2am and 3am. Otherwise, mostly clear, with a low around 40. West wind 5 to 8 mph becoming calm in the evening.
Thursday
Sunny, with a high near 68. North wind 5 to 11 mph, with gusts as high as 26 mph.
Thursday Night
Clear, with a low around 46. North wind around 8 mph, with gusts as high as 24 mph.
Friday
Sunny, with a high near 74. North wind around 7 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 43. Light north northwest wind.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly cloudy, with a low around 47.
Sunday
A chance of rain. Partly sunny, with a high near 69.
Sunday Night
A chance of rain. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 46.
Monday
A chance of rain. Patchy fog before 8am. Otherwise, partly sunny, with a high near 64.
Monday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 46.
Tuesday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 64.
Tuesday Night
A slight chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 45.
Wednesday
Areas of fog. Otherwise, mostly sunny, with a high near 69.
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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:
2:41 pm PDT Apr 15, 2026
Forecast Valid:
6pm PDT Apr 15, 2026-6pm PDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation