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

Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. 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 87%
Wind Speed SW 9 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 12 Apr 06:50 PM PDT
Extended Forecast for

6 Miles SE Lake Berryessa CA

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 40. West southwest wind around 6 mph becoming calm in the evening.

    Low: 40 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Areas of fog before 10am. Otherwise, sunny, with a high near 65. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 65 °F

    Areas Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, sunny, with a high near 67. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 67 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 42. Southwest wind around 6 mph becoming calm in the evening.

    Low: 42 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 68.

    High: 68 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 40. West southwest wind around 6 mph becoming calm in the evening.
Monday
Areas of fog before 10am. Otherwise, sunny, with a high near 65. Calm wind becoming north northwest around 5 mph in the afternoon.
Monday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 40. Calm wind.
Tuesday
Areas of fog before 9am. Otherwise, sunny, with a high near 67. Calm wind becoming south southwest around 6 mph in the afternoon.
Tuesday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 42. Southwest wind around 6 mph becoming calm in the evening.
Wednesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 68.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Sunny, with a high near 67.
Thursday Night
Clear, with a low around 46.
Friday
Sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 45.
Saturday
Sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
A slight chance of rain. Mostly sunny, with a high near 74.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SE Lake Berryessa CA
 38.51°N 122.2°W (Elev. 541 ft)
Last Update:
6:36 pm PDT Apr 12, 2026
Forecast Valid:
7pm PDT Apr 12, 2026-6pm PDT Apr 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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