Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

43°F

6°C

Humidity 70%
Wind Speed WNW 5 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Wind Chill40°F (4°C)
Last update 28 Dec 12:28 AM PST
Extended Forecast for

Pittsburg CA

  • Overnight

    Overnight: Partly cloudy, with a low around 42. West southwest wind around 6 mph.

    Low: 42 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 50. Northwest wind 5 to 7 mph becoming northeast in the afternoon.

    High: 50 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 39. East northeast wind 3 to 6 mph.

    Low: 39 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 48. Northeast wind around 9 mph.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Patchy fog between midnight and 1am.  Otherwise, partly cloudy, with a low around 38. East northeast wind 3 to 5 mph.

    Low: 38 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain after 4pm.  Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain, mainly after 10pm.  Patchy fog between 10pm and 1am.  Otherwise, cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain
    and Patchy
    Fog

Detailed Forecast

Overnight
Partly cloudy, with a low around 42. West southwest wind around 6 mph.
Sunday
Sunny, with a high near 50. Northwest wind 5 to 7 mph becoming northeast in the afternoon.
Sunday Night
Partly cloudy, with a low around 39. East northeast wind 3 to 6 mph.
Monday
Sunny, with a high near 48. Northeast wind around 9 mph.
Monday Night
Patchy fog between midnight and 1am. Otherwise, partly cloudy, with a low around 38. East northeast wind 3 to 5 mph.
Tuesday
Partly sunny, with a high near 49.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
A slight chance of rain after 4pm. Mostly cloudy, with a high near 48.
Wednesday Night
A chance of rain, mainly after 10pm. Patchy fog between 10pm and 1am. Otherwise, cloudy, with a low around 44.
New Year's Day
Rain likely, mainly after 10am. Cloudy, with a high near 50.
Thursday Night
Rain likely. Cloudy, with a low around 47.
Friday
A chance of rain. Mostly cloudy, with a high near 50.
Friday Night
A chance of rain. Mostly cloudy, with a low around 46.
Saturday
A slight chance of rain. Mostly cloudy, with a high near 50.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Pittsburg CA
 38.04°N 121.87°W (Elev. 3 ft)
12:27 am PST Dec 28, 2025
1am PST Dec 28, 2025-6pm PST Jan 3, 2026
 
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