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.

Mostly Cloudy

55°F

13°C

Humidity 74%
Wind Speed SW 11 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 14 Feb 04:54 PM PST
Extended Forecast for

4 Miles E Saint Helena CA

  • Tonight

    Tonight: A slight chance of rain before 10pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 46. Calm wind becoming southeast 5 to 9 mph after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Slight Chance
    Rain then
    Chance Rain

  • Sunday

    Sunday: Rain. High near 55. South southeast wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 55 °F

    Rain

  • Sunday Night

    Sunday Night: Rain. Low around 45. South southeast wind 5 to 7 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 45 °F

    Rain

  • Washington's Birthday

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

    High: 53 °F

    Rain and
    Patchy Fog

  • Monday Night

    Monday Night: Rain. Low around 39. South wind 5 to 9 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Rain

  • Tuesday

    Tuesday: Rain. High near 48. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 48 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain, mainly before 10pm. Patchy fog after 1am. Low around 33. Chance of precipitation is 80%.

    Low: 33 °F

    Rain then
    Chance Rain
    and Patchy
    Fog

  • Wednesday

    Wednesday: Rain likely, mainly after 10am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 52.

    High: 52 °F

    Rain Likely
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: Rain likely, mainly before 10pm. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 35.

    Low: 35 °F

    Rain Likely
    and Patchy
    Fog

Detailed Forecast

Tonight
A slight chance of rain before 10pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 46. Calm wind becoming southeast 5 to 9 mph after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain. High near 55. South southeast wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Rain. Low around 45. South southeast wind 5 to 7 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Washington's Birthday
Rain. Patchy fog before 10am. High near 53. Calm wind becoming west southwest 5 to 7 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Rain. Low around 39. South wind 5 to 9 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Rain. High near 48. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday Night
Rain, mainly before 10pm. Patchy fog after 1am. Low around 33. Chance of precipitation is 80%.
Wednesday
Rain likely, mainly after 10am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 52.
Wednesday Night
Rain likely, mainly before 10pm. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 35.
Thursday
A chance of rain. Patchy fog before 7am. Otherwise, partly sunny, with a high near 54.
Thursday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 36.
Friday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 54.
Friday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 38.
Saturday
A chance of rain. Partly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
Last Update:
1:22 pm PST Feb 14, 2026
Forecast Valid:
5pm PST Feb 14, 2026-6pm PST Feb 21, 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