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

Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

55°F

13°C

Humidity 96%
Wind Speed N 0 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 10 Apr 11:54 PM PDT
Extended Forecast for

Sonoma CA

  • Overnight

    Overnight: A 30 percent chance of rain, mainly between 1am and 3am. Patchy fog before 1am, then patchy fog after 2am. Otherwise, mostly cloudy, with a low around 48. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Chance Rain
    and Patchy
    Fog

  • Saturday

    Saturday: Rain likely, then showers and possibly a thunderstorm after 2pm. High near 60. Light south southeast wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 60 °F

    Rain Likely
    then Showers

  • Saturday Night

    Saturday Night: Rain and possibly a thunderstorm before 1am, then showers and possibly a thunderstorm, mainly after 1am. Low around 43. South southwest wind 5 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 43 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 59. Southwest wind 6 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 59 °F

    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of rain before 11pm. Patchy fog after 1am. Otherwise, partly cloudy, with a low around 40. West southwest wind 5 to 9 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Chance Rain
    then Patchy
    Fog

  • Monday

    Monday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 65.

    High: 65 °F

    Areas Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 10am. Otherwise, sunny, with a high near 67.

    High: 67 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 39.

    Low: 39 °F

    Clear then
    Patchy Fog

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly between 1am and 3am. Patchy fog before 1am, then patchy fog after 2am. Otherwise, mostly cloudy, with a low around 48. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain likely, then showers and possibly a thunderstorm after 2pm. High near 60. Light south southeast wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Rain and possibly a thunderstorm before 1am, then showers and possibly a thunderstorm, mainly after 1am. Low around 43. South southwest wind 5 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Showers and possibly a thunderstorm. High near 59. Southwest wind 6 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 30 percent chance of rain before 11pm. Patchy fog after 1am. Otherwise, partly cloudy, with a low around 40. West southwest wind 5 to 9 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Monday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 65.
Monday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 38.
Tuesday
Areas of fog before 10am. Otherwise, sunny, with a high near 67.
Tuesday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 39.
Wednesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 68.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
Sunny, with a high near 72.
Thursday Night
Clear, with a low around 42.
Friday
Sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
Last Update:
11:27 pm PDT Apr 10, 2026
Forecast Valid:
12am PDT Apr 11, 2026-6pm PDT Apr 17, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation