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Fire Weather Issues; Pacific System Moving Inland

Dry fuels, strong winds and dry weather will continue to bring elevated to critical fire weather conditions to the areas of the Plains, Midwest and Southeast today. A Pacific storm system will bring low elevation rain and heavy high elevation mountain snow to California through early week, expanding into the Pacific Northwest, Great Basin, and southern California on Tuesday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

64°F

18°C

Humidity 42%
Wind Speed E 6 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 20 Apr 11:54 AM PDT
Extended Forecast for

4 Miles SE Saint Helena CA

  • This Afternoon

    This Afternoon: Rain likely and possibly a thunderstorm before 3pm, then showers and possibly a thunderstorm between 3pm and 5pm, then rain and possibly a thunderstorm after 5pm. High near 62. South wind 7 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 62 °F

    Showers

  • Tonight

    Tonight: Rain. Patchy fog after 10pm. Low around 48. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Rain and
    Patchy Fog

  • Tuesday

    Tuesday: Rain and thunderstorms likely, then showers and possibly a thunderstorm after 11am. Areas of fog before 10am. High near 61. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 61 °F

    Showers and
    Areas Fog

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 11pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 43. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Rain Likely
    and Patchy
    Fog then
    Chance Rain
    and Patchy
    Fog

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly before 11am. Areas of fog before 9am. Otherwise, mostly sunny, with a high near 66. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 66 °F

    Chance Rain
    and Areas Fog

  • Wednesday Night

    Wednesday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, sunny, with a high near 74.

    High: 74 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Rain likely and possibly a thunderstorm before 3pm, then showers and possibly a thunderstorm between 3pm and 5pm, then rain and possibly a thunderstorm after 5pm. High near 62. South wind 7 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Rain. Patchy fog after 10pm. Low around 48. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Rain and thunderstorms likely, then showers and possibly a thunderstorm after 11am. Areas of fog before 10am. High near 61. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Rain likely, mainly before 11pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 43. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A 30 percent chance of rain, mainly before 11am. Areas of fog before 9am. Otherwise, mostly sunny, with a high near 66. Calm wind becoming west southwest around 5 mph in the afternoon.
Wednesday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 42.
Thursday
Patchy fog before 8am. Otherwise, sunny, with a high near 74.
Thursday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 45.
Friday
Mostly sunny, with a high near 75.
Friday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 46.
Saturday
Patchy fog. Otherwise, mostly sunny, with a high near 72.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 48.
Sunday
Partly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Saint Helena CA
 38.45°N 122.41°W (Elev. 157 ft)
Last Update:
11:27 am PDT Apr 20, 2026
Forecast Valid:
12pm PDT Apr 20, 2026-6pm PDT Apr 26, 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