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

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

44°F

7°C

Humidity 100%
Wind Speed S 12 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 27 Dec 02:28 AM PST
Extended Forecast for

4 Miles ENE Clayton CA

  • Overnight

    Overnight: A 20 percent chance of rain. Partly cloudy, with a low around 42. West southwest wind around 10 mph.

    Low: 42 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 46. West wind around 9 mph becoming north in the afternoon.

    High: 46 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 38. West wind around 7 mph.

    Low: 38 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 45. North northeast wind around 8 mph.

    High: 45 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Patchy frost after 1am. Otherwise, mostly clear, with a low around 36. Northeast wind around 7 mph.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Monday

    Monday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

  • Monday Night

    Monday Night: Patchy frost after 4am. Otherwise, mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear
    then Patchy
    Frost

  • Tuesday

    Tuesday: Patchy frost before 7am. Otherwise, mostly sunny, with a high near 47.

    High: 47 °F

    Patchy Frost
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy frost after 5am. Otherwise, mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear
    then Patchy
    Frost

Detailed Forecast

Overnight
A 20 percent chance of rain. Partly cloudy, with a low around 42. West southwest wind around 10 mph.
Saturday
Mostly sunny, with a high near 46. West wind around 9 mph becoming north in the afternoon.
Saturday Night
Increasing clouds, with a low around 38. West wind around 7 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 45. North northeast wind around 8 mph.
Sunday Night
Patchy frost after 1am. Otherwise, mostly clear, with a low around 36. Northeast wind around 7 mph.
Monday
Sunny, with a high near 47.
Monday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 37.
Tuesday
Patchy frost before 7am. Otherwise, mostly sunny, with a high near 47.
Tuesday Night
Patchy frost after 5am. Otherwise, mostly clear, with a low around 37.
Wednesday
Patchy frost before 7am. Otherwise, mostly sunny, with a high near 47.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 40.
New Year's Day
A chance of rain. Cloudy, with a high near 47.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 43.
Friday
A chance of rain. Partly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Clayton CA
 37.95°N 121.88°W (Elev. 1358 ft)
Last Update:
12:27 am PST Dec 27, 2025
Forecast Valid:
2am PST Dec 27, 2025-6pm PST Jan 2, 2026
 
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