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

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

72°F

22°C

Humidity 56%
Wind Speed SSE 9 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 06 Oct 09:00 PM PDT
Extended Forecast for

4 Miles E Saint Helena CA

Coastal Flood Advisory until October 8, 01:00pm
Heat Advisory October 6, 09:17pm until October 8, 10:00pm
Click here for hazard details and duration
Coastal Flood Advisory
Heat Advisory
  •  
    Coastal Flood Advisory until October 8, 01:00pm
    Heat Advisory October 6, 09:17pm until October 8, 10:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Friday Night

    Friday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 75.

    High: 75 °F

    Areas Fog
    then Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 58. Calm wind.
Wednesday
Sunny and hot, with a high near 98. Calm wind becoming west southwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 57. Calm wind.
Thursday
Sunny and hot, with a high near 98. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 57. Calm wind.
Friday
Sunny, with a high near 91.
Friday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 51.
Saturday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 75.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Sunny, with a high near 71.
Sunday Night
Mostly clear, with a low around 48.
Columbus Day
Sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Sunny, with a high near 75.
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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:
9:12 pm PDT Oct 6, 2026
Forecast Valid:
9pm PDT Oct 6, 2026-6pm PDT Oct 13, 2026
 
Forecast Discussion
 
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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