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.

Partly Cloudy

63°F

17°C

Humidity 77%
Wind Speed SSW 14 MPH
Barometer 29.84 in (1010.5 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 10 Apr 03:35 PM PDT
Extended Forecast for

2 Miles SSW Lake Berryessa CA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 59. Southwest wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 59 °F

    Showers
    Likely

  • Tonight

    Tonight: Rain and thunderstorms likely before 11pm, then a chance of rain. Mostly cloudy, with a low around 51. South southwest wind 7 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Rain Likely

  • Saturday

    Saturday: Rain and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 54. South wind 9 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 54 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 8pm, then rain between 8pm and 11pm, then showers and possibly a thunderstorm after 11pm. Low around 46. South wind 9 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 46 °F

    Showers

  • Sunday

    Sunday: Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 52. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 52 °F

    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of rain before 11pm. Partly cloudy, with a low around 45. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Chance Rain
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 59. Southwest wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and thunderstorms likely before 11pm, then a chance of rain. Mostly cloudy, with a low around 51. South southwest wind 7 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 54. South wind 9 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm before 8pm, then rain between 8pm and 11pm, then showers and possibly a thunderstorm after 11pm. Low around 46. South wind 9 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Sunday
Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 52. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A 40 percent chance of rain before 11pm. Partly cloudy, with a low around 45. New precipitation amounts of less than a tenth of an inch possible.
Monday
Mostly sunny, with a high near 60.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 64.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Lake Berryessa CA
 38.54°N 122.26°W (Elev. 1824 ft)
Last Update:
2:57 pm PDT Apr 10, 2026
Forecast Valid:
3pm PDT Apr 10, 2026-6pm PDT Apr 17, 2026
 
Forecast Discussion
 
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Additional Resources

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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