Heavy Snow in the Sierra Nevada; Heavy Rainfall in Texas Sunday

Heavy snow is expected in the Sierra Nevada mountain ranges into Saturday causing hazardous travel conditions. Winter Storm Warnings have been issued. Thunderstorms and moderate to heavy rainfall are expected across portions of eastern Texas into Louisiana on Sunday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

55°F

13°C

Humidity 86%
Wind Speed ESE 3 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 14 Nov 07:54 PM PST
Extended Forecast for

4 Miles E Saint Helena CA

  • Tonight

    Tonight: Patchy fog after 9pm.  Otherwise, cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Patchy Fog

  • Sunday

    Sunday: Rain, mainly after 10am.  Patchy fog after 4pm. High near 59. South southeast wind 5 to 9 mph, with gusts as high as 21 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 59 °F

    Rain and
    Patchy Fog

  • Sunday Night

    Sunday Night: Rain likely, mainly before 2am.  Patchy fog.  Otherwise, mostly cloudy, with a low around 42. Calm wind.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Rain Likely
    and Patchy
    Fog

  • Monday

    Monday: Patchy fog before 10am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Calm wind becoming west around 5 mph in the afternoon.

    High: 60 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 1am. Patchy frost after 5am.  Otherwise, mostly clear, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Frost and
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Patchy frost before 8am.  Otherwise, sunny, with a high near 59.

    High: 59 °F

    Patchy Frost
    and Patchy
    Fog then
    Sunny

  • Tuesday Night

    Tuesday Night: Rain after 10pm.  Patchy fog before 1am. Low around 42. Chance of precipitation is 80%.

    Low: 42 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: Rain before 4pm, then showers and possibly a thunderstorm after 4pm.  Cloudy, with a high near 55.

    High: 55 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 10pm, then rain after 10pm.  Patchy fog.  Otherwise, mostly cloudy, with a low around 41.

    Low: 41 °F

    Showers and
    Patchy Fog

Detailed Forecast

Tonight
Patchy fog after 9pm. Otherwise, cloudy, with a low around 45. Calm wind.
Sunday
Rain, mainly after 10am. Patchy fog after 4pm. High near 59. South southeast wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain likely, mainly before 2am. Patchy fog. Otherwise, mostly cloudy, with a low around 42. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Calm wind becoming west around 5 mph in the afternoon.
Monday Night
Patchy fog after 1am. Patchy frost after 5am. Otherwise, mostly clear, with a low around 35. Calm wind.
Tuesday
Patchy fog before 9am. Patchy frost before 8am. Otherwise, sunny, with a high near 59.
Tuesday Night
Rain after 10pm. Patchy fog before 1am. Low around 42. Chance of precipitation is 80%.
Wednesday
Rain before 4pm, then showers and possibly a thunderstorm after 4pm. Cloudy, with a high near 55.
Wednesday Night
Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 41.
Thursday
Rain, mainly before 4pm. Areas of fog before 7am. Otherwise, mostly cloudy, with a high near 55.
Thursday Night
A chance of rain. Patchy fog. Patchy frost. Otherwise, partly cloudy, with a low around 38.
Friday
Patchy fog. Patchy frost. Otherwise, mostly sunny, with a high near 59.
Friday Night
Patchy fog. Otherwise, partly cloudy, with a low around 38.
Saturday
A slight chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 57.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
12:46 pm PST Nov 14, 2026
8pm PST Nov 14, 2026-6pm PST Nov 21, 2026
 
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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