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

Heavy Rain in the Southern U.S.; Active Weather Continues in Alaska

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains today, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. Another Bering system will impact the Alaskan West Coast and Central Interior through the weekend bringing moderate to heavy snow, high winds, and/or some blizzard conditions. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

49°F

9°C

Humidity 92%
Wind Speed N 4 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 14 Feb 07:54 AM PST
Extended Forecast for

4 Miles E Saint Helena CA

  • Today

    Today: Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 56. Calm wind becoming south around 5 mph in the afternoon.

    High: 56 °F

    Areas Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: A 20 percent chance of rain after 2am. Mostly cloudy, with a low around 46. Calm wind becoming south southeast around 6 mph in the evening. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Cloudy then
    Slight Chance
    Rain

  • Sunday

    Sunday: Rain likely, mainly after 4pm. Cloudy, with a high near 56. South southeast wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 56 °F

    Rain Likely

  • Sunday Night

    Sunday Night: Rain. Patchy fog after 10pm. Low around 44. Calm wind. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 44 °F

    Rain and
    Patchy Fog

  • Washington's Birthday

    Washington's Birthday: Rain. Areas of fog before 10am. High near 53. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 53 °F

    Rain and
    Areas Fog

  • Monday Night

    Monday Night: Rain. Low around 39. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Rain

  • Tuesday

    Tuesday: Rain before 4pm, then showers and possibly a thunderstorm after 4pm. High near 48. Chance of precipitation is 100%.

    High: 48 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 10pm, then rain likely, mainly between 10pm and 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 34.

    Low: 34 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Rain likely, mainly after 10am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 52.

    High: 52 °F

    Rain Likely
    and Patchy
    Fog

Detailed Forecast

Today
Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 56. Calm wind becoming south around 5 mph in the afternoon.
Tonight
A 20 percent chance of rain after 2am. Mostly cloudy, with a low around 46. Calm wind becoming south southeast around 6 mph in the evening. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain likely, mainly after 4pm. Cloudy, with a high near 56. South southeast wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Rain. Patchy fog after 10pm. Low around 44. Calm wind. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Washington's Birthday
Rain. Areas of fog before 10am. High near 53. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
Rain. Low around 39. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Rain before 4pm, then showers and possibly a thunderstorm after 4pm. High near 48. Chance of precipitation is 100%.
Tuesday Night
Showers and possibly a thunderstorm before 10pm, then rain likely, mainly between 10pm and 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 34.
Wednesday
Rain likely, mainly after 10am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 52.
Wednesday Night
Rain likely, mainly before 10pm. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 33.
Thursday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 54.
Thursday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 34.
Friday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 57.
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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:
2:46 am PST Feb 14, 2026
Forecast Valid:
8am PST Feb 14, 2026-6pm PST Feb 20, 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