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

57°F

14°C

Humidity 62%
Wind Speed NNE 3 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 15 Oct 10:05 PM PDT
Extended Forecast for

4 Miles SE Saint Helena CA

  • Tonight

    Tonight: Mostly clear, with a low around 54. North northwest wind 3 to 6 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 92. North northwest wind 5 to 7 mph becoming calm in the afternoon.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92. Calm wind.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 48. Calm wind.

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 9pm. Otherwise, mostly clear, with a low around 43.

    Low: 43 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 68.

    High: 68 °F

    Patchy Fog
    then Partly
    Sunny

  • Monday Night

    Monday Night: A slight chance of rain after 11pm. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 45.

    Low: 45 °F

    Slight Chance
    Rain and
    Patchy Fog

Detailed Forecast

Tonight
Mostly clear, with a low around 54. North northwest wind 3 to 6 mph.
Friday
Sunny, with a high near 92. North northwest wind 5 to 7 mph becoming calm in the afternoon.
Friday Night
Mostly clear, with a low around 52. Calm wind.
Saturday
Sunny, with a high near 92. Calm wind.
Saturday Night
Mostly clear, with a low around 48. Calm wind.
Sunday
Sunny, with a high near 80.
Sunday Night
Patchy fog after 9pm. Otherwise, mostly clear, with a low around 43.
Monday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 68.
Monday Night
A slight chance of rain after 11pm. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 45.
Tuesday
A chance of rain, mainly after 11am. Areas of fog before 8am. Otherwise, partly sunny, with a high near 68.
Tuesday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 45.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 70.
Wednesday Night
Patchy fog. Otherwise, mostly clear, with a low around 46.
Thursday
Patchy fog. Otherwise, mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Saint Helena CA
 38.45°N 122.41°W (Elev. 157 ft)
Last Update:
1:56 pm PDT Oct 15, 2026
Forecast Valid:
10pm PDT Oct 15, 2026-6pm PDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation