Winter Weather Across Portions of the Mid-Atlantic; Heavy Rain Along the Gulf Coast and Southeast

A storm system will continue to slowly move through the Gulf Coast and Southeast U.S. over the next couple of days, bringing a heavy rainfall threat through the weekend. Isolated instances of flooding may occur. On the north side of this storm system, colder air will support areas of mixed wintry precipitation and light snow from the Tennessee Valley to the Mid-Atlantic Friday. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

49°F

9°C

Humidity 39%
Wind Speed WNW 2 MPH
Barometer NA
Dewpoint 25°F (-4°C)
Visibility NA
Last update 04 Dec 11:28 PM PST
Extended Forecast for

Clayton CA

  • Overnight

    Overnight: Mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62. Calm wind becoming north northeast around 5 mph.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Patchy fog after 4am.  Otherwise, mostly clear, with a low around 42. South southwest wind around 5 mph becoming calm  after midnight.

    Low: 42 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 10am.  Otherwise, sunny, with a high near 64. Light north northwest wind.

    High: 64 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44. Calm wind becoming east around 5 mph after midnight.

    Low: 44 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy fog before 10am.  Otherwise, partly sunny, with a high near 64.

    High: 64 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 1am.  Otherwise, partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 64.

    High: 64 °F

    Areas Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 5am.  Otherwise, partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy
    then Patchy
    Fog

Detailed Forecast

Overnight
Mostly clear, with a low around 40. Calm wind.
Friday
Sunny, with a high near 62. Calm wind becoming north northeast around 5 mph.
Friday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 42. South southwest wind around 5 mph becoming calm after midnight.
Saturday
Patchy fog before 10am. Otherwise, sunny, with a high near 64. Light north northwest wind.
Saturday Night
Mostly clear, with a low around 44. Calm wind becoming east around 5 mph after midnight.
Sunday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 64.
Sunday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 44.
Monday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 64.
Monday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 44.
Tuesday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 63.
Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 45.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 64.
Wednesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 45.
Thursday
Patchy fog. Otherwise, mostly sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.96°N 121.97°W (Elev. 249 ft)
7:35 pm PST Dec 4, 2025
12am PST Dec 5, 2025-6pm PST Dec 11, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database