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

Dangerous Heat and Possible Flooding This Week

Hot temperatures and high humidity are forecast to continue across much of east Texas into the mid-Mississippi Valley through this week. Heavy to excessive rainfall occurring at times through Friday could bring areas of flooding across parts of the central Plains into the upper Midwest and Four Corners states. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

81°F

27°C

Humidity 33%
Wind Speed WNW 2 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Heat Index80°F (27°C)
Last update 15 Sep 11:28 AM PDT
Extended Forecast for

Pittsburg CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 81. West wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 60. West southwest wind 11 to 14 mph, with gusts as high as 24 mph.

    Low: 60 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 74. Southwest wind 14 to 18 mph, with gusts as high as 29 mph.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60. West southwest wind 8 to 16 mph, with gusts as high as 28 mph.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 76. West northwest wind 5 to 7 mph.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 81. West wind 7 to 11 mph, with gusts as high as 18 mph.
Tonight
Clear, with a low around 60. West southwest wind 11 to 14 mph, with gusts as high as 24 mph.
Wednesday
Sunny, with a high near 74. Southwest wind 14 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
Partly cloudy, with a low around 60. West southwest wind 8 to 16 mph, with gusts as high as 28 mph.
Thursday
Mostly sunny, with a high near 76. West northwest wind 5 to 7 mph.
Thursday Night
Clear, with a low around 60.
Friday
Sunny, with a high near 82.
Friday Night
Clear, with a low around 61.
Saturday
Sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 60.
Monday
Sunny, with a high near 78.
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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:
11:27 am PDT Sep 15, 2026
Forecast Valid:
12pm PDT Sep 15, 2026-6pm PDT Sep 21, 2026
 
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Additional Resources

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Chance of Precipitation