Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

57°F

14°C

Humidity 33%
Wind Speed N 4 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 18 Jan 07:28 PM PST
Extended Forecast for

Pittsburg CA

  • Tonight

    Tonight: Partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Patchy dense fog between 9am and 11am.  Otherwise, mostly sunny, with a high near 58. East wind 3 to 6 mph.

    High: 58 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Monday Night

    Monday Night: Patchy fog after 11pm.  Otherwise, partly cloudy, with a low around 42. Light east northeast wind.

    Low: 42 °F

    Patchy Fog

  • Tuesday

    Tuesday: Partly sunny, with a high near 60. Northeast wind around 7 mph.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 44. Light north wind.

    Low: 44 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 58.

    High: 58 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 60.

    High: 60 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 1am.  Otherwise, mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear
    then Patchy
    Fog

Detailed Forecast

Tonight
Partly cloudy, with a low around 42. Calm wind.
M.L.King Day
Patchy dense fog between 9am and 11am. Otherwise, mostly sunny, with a high near 58. East wind 3 to 6 mph.
Monday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 42. Light east northeast wind.
Tuesday
Partly sunny, with a high near 60. Northeast wind around 7 mph.
Tuesday Night
Mostly cloudy, with a low around 44. Light north wind.
Wednesday
Mostly cloudy, with a high near 58.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 60.
Thursday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 45.
Friday
Patchy fog before noon. Otherwise, mostly sunny, with a high near 59.
Friday Night
Mostly clear, with a low around 44.
Saturday
Patchy fog. Otherwise, partly sunny, with a high near 58.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 44.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 58.
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)
12:26 pm PST Jan 18, 2026
8pm PST Jan 18, 2026-6pm PST Jan 25, 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