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

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

41°F

5°C

Humidity 85%
Wind Speed N 2 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 07 Dec 07:28 PM PST
Extended Forecast for

3 Miles E Clayton CA

  • Tonight

    Tonight: Patchy dense fog between 2am and 3am. Otherwise, partly cloudy, with a low around 41. Light and variable wind.

    Low: 41 °F

    Patchy Dense
    Fog

  • Monday

    Monday: Patchy dense fog before 9am. Otherwise, sunny, with a high near 50. Light and variable wind becoming northeast around 6 mph in the morning.

    High: 50 °F

    Patchy Dense
    Fog then
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42. Light south wind.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Patchy fog between 10am and 11am. Otherwise, mostly sunny, with a high near 54. North wind 3 to 6 mph.

    High: 54 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. West wind 3 to 5 mph.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy dense fog between 2am and 3am. Otherwise, partly cloudy, with a low around 41. Light and variable wind.
Monday
Patchy dense fog before 9am. Otherwise, sunny, with a high near 50. Light and variable wind becoming northeast around 6 mph in the morning.
Monday Night
Partly cloudy, with a low around 42. Light south wind.
Tuesday
Patchy fog between 10am and 11am. Otherwise, mostly sunny, with a high near 54. North wind 3 to 6 mph.
Tuesday Night
Partly cloudy, with a low around 45. West wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 56.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Mostly sunny, with a high near 56.
Thursday Night
Mostly clear, with a low around 43.
Friday
Mostly sunny, with a high near 54.
Friday Night
Mostly clear, with a low around 43.
Saturday
Patchy fog. Otherwise, mostly sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Patchy fog. Otherwise, partly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Clayton CA
 37.95°N 121.88°W (Elev. 1358 ft)
Last Update:
6:20 pm PST Dec 7, 2025
Forecast Valid:
8pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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National Digital Forecast Database Weather Element Forecast

Chance of Precipitation