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

Storm Impacting the Southwest U.S.; Above Normal Temperatures Further East

A storm system will shift across the southwest U.S. through Thursday with widespread showers and isolated thunderstorms. Isolated flooding is possible. High-elevation snow is also expected in parts of Nevada and the southern Sierra Nevada range. East of this storm, above average temperatures will challenge or break daily record high temperatures this week in the southern Plains and southeast U.S. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

53°F

12°C

Humidity 79%
Wind Speed NNE 8 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 18 Nov 11:28 AM PST
Extended Forecast for

Pittsburg CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 58. West wind 5 to 10 mph.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 48. Southwest wind 5 to 11 mph becoming east after midnight.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 56. North wind around 5 mph becoming light and variable.

    High: 56 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 4am. Mostly cloudy, with a low around 52. South southwest wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely, mainly before 10am. Mostly cloudy, with a high near 54. South southeast wind 9 to 11 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 58. West wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 48. Southwest wind 5 to 11 mph becoming east after midnight.
Wednesday
Partly sunny, with a high near 56. North wind around 5 mph becoming light and variable.
Wednesday Night
Rain likely, mainly after 4am. Mostly cloudy, with a low around 52. South southwest wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 54. South southeast wind 9 to 11 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Sunny, with a high near 58.
Friday Night
Mostly clear, with a low around 47.
Saturday
Sunny, with a high near 58.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Mostly sunny, with a high near 58.
Sunday Night
Partly cloudy, with a low around 47.
Monday
Partly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pittsburg CA
 38.04°N 121.87°W (Elev. 3 ft)
Last Update:
8:01 am PST Nov 18, 2025
Forecast Valid:
12pm PST Nov 18, 2025-6pm PST Nov 24, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation