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

Tracking Atmospheric River for California; Record Temperatures Further East

An atmospheric river will bring gusty to high winds, moderate to heavy rainfall, and potential flooding to California today through Saturday. Heavy snow will be possible over the Sierra Nevada mountains into Friday associated with this atmospheric river. East of these impacts dozens of record high maximum and high minimum temperatures may be broken or tied today and Friday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

light rain,mist

59°F

15°C

Humidity 93%
Wind Speed S 10 MPH
Barometer 29.82 in (1009.82 mb)
Dewpoint 57°F (14°C)
Visibility 2.50 mi
Last update 13 Nov 01:20 PM PST
Extended Forecast for

3 Miles NNE Hercules CA

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm before 4pm, then rain likely and possibly a thunderstorm after 4pm. Steady temperature around 60. South southwest wind around 18 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 60 °F

    Showers

  • Tonight

    Tonight: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 54. South southwest wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Rain Likely

  • Friday

    Friday: A 30 percent chance of rain. Partly sunny, with a high near 63. Northeast wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Chance Rain

  • Friday Night

    Friday Night: A 20 percent chance of rain before 4am. Partly cloudy, with a low around 50. Light north wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: A 20 percent chance of rain after 10am. Partly sunny, with a high near 63. Calm wind becoming west southwest around 6 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 54. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Chance Rain

  • Sunday

    Sunday: A 40 percent chance of rain. Mostly cloudy, with a high near 59.

    High: 59 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A chance of rain. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance Rain

  • Monday

    Monday: A chance of rain, mainly before 4pm. Partly sunny, with a high near 58.

    High: 58 °F

    Chance Rain

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm before 4pm, then rain likely and possibly a thunderstorm after 4pm. Steady temperature around 60. South southwest wind around 18 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 54. South southwest wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 63. Northeast wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A 20 percent chance of rain before 4am. Partly cloudy, with a low around 50. Light north wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 20 percent chance of rain after 10am. Partly sunny, with a high near 63. Calm wind becoming west southwest around 6 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 54. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 59.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 51.
Monday
A chance of rain, mainly before 4pm. Partly sunny, with a high near 58.
Monday Night
A slight chance of rain before 10pm. Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Hercules CA
 38.05°N 122.25°W (Elev. 56 ft)
Last Update:
12:26 pm PST Nov 13, 2025
Forecast Valid:
1pm PST Nov 13, 2025-6pm PST Nov 19, 2025
 
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