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

Heavy Rain and Flooding Concerns in Hawaii; Severe Weather in the Plains

A storm system is expected to bring strong winds, widespread heavy rainfall, and flooding concerns to the Hawaiian Islands through the weekend. Strong to severe thunderstorms are forecast from the Southern Plains to the Mid-Missouri Valley Thursday afternoon and evening. Large hail and strong winds are the primary threats. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

54°F

12°C

Humidity 93%
Wind Speed NNW 4 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 09 Apr 06:35 AM PDT
Extended Forecast for

Napa CA

  • Today

    Today: A slight chance of rain before 2pm, then a slight chance of showers and thunderstorms between 2pm and 4pm. Areas of fog before 11am. Otherwise, partly sunny, with a high near 70. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 20%.

    High: 70 °F

    Areas Fog
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A chance of rain, mainly between 1am and 2am, then a chance of showers and thunderstorms after 2am. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 50. West southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Showers and possibly a thunderstorm. Areas of fog before 11am. High near 65. Calm wind becoming south southwest 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Showers and
    Areas Fog

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 11pm, then rain likely after 11pm. Low around 50. Southwest wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Showers

  • Saturday

    Saturday: Rain likely, then showers and possibly a thunderstorm after 11am. High near 59. Light south southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 59 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm, mainly before 2am, then rain likely after 2am. Low around 44. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 44 °F

    Showers

  • Sunday

    Sunday: Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.

    High: 58 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of rain before 11pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 65.

    High: 65 °F

    Patchy Fog
    then Mostly
    Sunny

Detailed Forecast

Today
A slight chance of rain before 2pm, then a slight chance of showers and thunderstorms between 2pm and 4pm. Areas of fog before 11am. Otherwise, partly sunny, with a high near 70. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 20%.
Tonight
A chance of rain, mainly between 1am and 2am, then a chance of showers and thunderstorms after 2am. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 50. West southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and possibly a thunderstorm. Areas of fog before 11am. High near 65. Calm wind becoming south southwest 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm before 11pm, then rain likely after 11pm. Low around 50. Southwest wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain likely, then showers and possibly a thunderstorm after 11am. High near 59. Light south southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm, mainly before 2am, then rain likely after 2am. Low around 44. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.
Sunday Night
A chance of rain before 11pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 40.
Monday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
Last Update:
1:26 am PDT Apr 9, 2026
Forecast Valid:
6am PDT Apr 9, 2026-6pm PDT Apr 15, 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