Critical Fire Weather Conditions Continue; Pacific Storm to Bring Heavy Snow to the Sierra-Nevada

Critical fire weather conditions are forecast for the Southern Plains and portions of Florida through Thursday, as gusty winds and dry conditions return to the region. A Pacific storm system will bring strong winds and low elevation rain to much of the West Coast and central Great Basin, and heavy high elevation mountain snow to the Sierra-Nevada through Wednesday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Rain

56°F

13°C

Humidity 93%
Wind Speed SSE 4 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 21 Apr 08:54 AM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Today

    Today: Showers and thunderstorms, mainly before 4pm, then rain likely and possibly a thunderstorm after 5pm.  Areas of fog before 10am. High near 59. Calm wind becoming southwest 5 to 7 mph in the afternoon.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 59 °F

    Showers and
    Areas Fog

  • Tonight

    Tonight: A chance of rain before 10pm, then a chance of rain after 1am.  Patchy fog after 11pm.  Otherwise, mostly cloudy, with a low around 42. West southwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Chance Rain
    and Patchy
    Fog

  • Wednesday

    Wednesday: A 30 percent chance of rain before 11am.  Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 64. Calm wind becoming south around 5 mph in the afternoon.

    High: 64 °F

    Chance Rain
    and Areas Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Areas of fog after 1am.  Otherwise, mostly clear, with a low around 41. Light and variable wind.

    Low: 41 °F

    Mostly Clear
    then Areas
    Fog

  • Thursday

    Thursday: Patchy fog before 8am.  Otherwise, sunny, with a high near 72. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 72 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 7am.  Otherwise, sunny, with a high near 74.

    High: 74 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 2am.  Otherwise, partly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and thunderstorms, mainly before 4pm, then rain likely and possibly a thunderstorm after 5pm. Areas of fog before 10am. High near 59. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A chance of rain before 10pm, then a chance of rain after 1am. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 42. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A 30 percent chance of rain before 11am. Areas of fog before 9am. Otherwise, mostly sunny, with a high near 64. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Areas of fog after 1am. Otherwise, mostly clear, with a low around 41. Light and variable wind.
Thursday
Patchy fog before 8am. Otherwise, sunny, with a high near 72. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 44.
Friday
Patchy fog before 7am. Otherwise, sunny, with a high near 74.
Friday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 46.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 46.
Sunday
Mostly sunny, with a high near 68.
Sunday Night
Patchy fog. Otherwise, partly cloudy, with a low around 46.
Monday
Patchy fog. Otherwise, mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
8:47 am PDT Apr 21, 2026
9am PDT Apr 21, 2026-6pm PDT Apr 27, 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