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

51°F

11°C

Humidity 68%
Wind Speed N 0 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 15 Oct 12:54 AM PDT
Extended Forecast for

4 Miles SE Saint Helena CA

  • Overnight

    Overnight: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Light and variable wind becoming north northeast 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. Calm wind becoming north northwest 5 to 7 mph in the evening.

    Low: 55 °F

    Mostly Clear

  • Friday

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

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Saturday Night

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

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Areas of fog after 10pm. Otherwise, mostly clear, with a low around 44.

    Low: 44 °F

    Areas Fog

Detailed Forecast

Overnight
Mostly clear, with a low around 49. Calm wind.
Thursday
Sunny, with a high near 91. Light and variable wind becoming north northeast 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 55. Calm wind becoming north northwest 5 to 7 mph in the evening.
Friday
Sunny, with a high near 92. North northeast wind 5 to 7 mph becoming calm in the afternoon.
Friday Night
Mostly clear, with a low around 51. Calm wind.
Saturday
Sunny, with a high near 91.
Saturday Night
Mostly clear, with a low around 48.
Sunday
Sunny, with a high near 80.
Sunday Night
Areas of fog after 10pm. Otherwise, mostly clear, with a low around 44.
Monday
Areas of fog before 8am. Otherwise, partly sunny, with a high near 71.
Monday Night
Patchy fog. Otherwise, partly cloudy, with a low around 44.
Tuesday
A slight chance of rain. Areas of fog. Otherwise, mostly sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 73.
Basemap Options
Click map to change the forecast location
Loading map...
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:
12:21 am PDT Oct 15, 2026
Forecast Valid:
1am PDT Oct 15, 2026-6pm PDT Oct 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation