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

BLACK DIAMOND (PIBC1)

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

NA

72°F

22°C

Humidity 38%
Wind Speed S 15 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Last update 18 Oct 05:28 PM PDT
Extended Forecast for

Brentwood CA

  • Tonight

    Tonight: Mostly clear, with a low around 51. West wind 6 to 8 mph.

    Low: 51 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 72. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 72 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Increasing clouds, with a low around 50. West wind 5 to 8 mph becoming calm in the evening.

    Low: 50 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 71. Light and variable wind.

    High: 71 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Rain likely, mainly after 11pm. Mostly cloudy, with a low around 53. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 53 °F

    Rain Likely

  • Wednesday

    Wednesday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 71. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 71 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Chance Rain

  • Thursday

    Thursday: A slight chance of rain before 11am. Patchy fog before 9am. Otherwise, partly sunny, with a high near 72.

    High: 72 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 51. West wind 6 to 8 mph.
Monday
Increasing clouds, with a high near 72. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Monday Night
Increasing clouds, with a low around 50. West wind 5 to 8 mph becoming calm in the evening.
Tuesday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 71. Light and variable wind.
Tuesday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 53. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 71. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 52.
Thursday
A slight chance of rain before 11am. Patchy fog before 9am. Otherwise, partly sunny, with a high near 72.
Thursday Night
Partly cloudy, with a low around 51.
Friday
Sunny, with a high near 73.
Friday Night
Clear, with a low around 50.
Saturday
Patchy fog. Otherwise, sunny, with a high near 74.
Saturday Night
Mostly clear, with a low around 50.
Sunday
A slight chance of rain. Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brentwood CA
 37.94°N 121.68°W (Elev. 52 ft)
Last Update:
1:47 pm PDT Oct 18, 2026
Forecast Valid:
5pm PDT Oct 18, 2026-6pm PDT Oct 25, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation