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

Strong Storm System Brings Heavy Mountain Snow to the Sierra Nevada and Critical Fire Weather Conditions to the Plains

A Pacific storm system will continue to bring low elevation rain and mountain snow to much of the West through Wednesday, with heavy mountain snow expected in the higher elevations of the Sierra Nevada. This system will also bring strong winds to the Intermountain West, Rockies, and Plains, which will create Critical fire weather conditions for the High Plains. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.

NA

52°F

11°C

Humidity 69%
Wind Speed S 17 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 21 Apr 06:28 PM PDT
Extended Forecast for

Bethel Island CA

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 48. West southwest wind 7 to 9 mph becoming south after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers between 11am and 2pm. Mostly sunny, with a high near 64. South southeast wind around 7 mph becoming west northwest in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47. West wind around 7 mph.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 71. Northwest wind 5 to 8 mph.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. West southwest wind 6 to 8 mph.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 48. West southwest wind 7 to 9 mph becoming south after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 40 percent chance of showers between 11am and 2pm. Mostly sunny, with a high near 64. South southeast wind around 7 mph becoming west northwest in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Mostly clear, with a low around 47. West wind around 7 mph.
Thursday
Sunny, with a high near 71. Northwest wind 5 to 8 mph.
Thursday Night
Mostly clear, with a low around 48. West southwest wind 6 to 8 mph.
Friday
Mostly sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Partly cloudy, with a low around 50.
Sunday
Mostly sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 49.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
A slight chance of rain. Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethel Island CA
 38.03°N 121.64°W (Elev. 3 ft)
Last Update:
2:36 pm PDT Apr 21, 2026
Forecast Valid:
7pm PDT Apr 21, 2026-6pm PDT Apr 28, 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