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

Heavy Rainfall for Portions of the West and Central U.S.; Monitoring Fire Weather Conditions for New England

Tropical moisture continues to flow across portions of the Great Basin, desert Southwest and California. Isolated instances of flash flooding remains possible. Meanwhile, a storm and associated frontal boundary will focus showers and thunderstorms for the center of the nation. For New England, dry and breezy conditions could enhance favorable fire weather conditions. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

65°F

18°C

Humidity 67%
Wind Speed SSE 7 MPH
Barometer NA
Dewpoint 54°F (12°C)
Visibility NA
Last update 19 Sep 09:28 PM PDT
Extended Forecast for

Brentwood CA

  • Tonight

    Tonight: Mostly clear, with a low around 63. Northwest wind 5 to 9 mph becoming calm after midnight.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88. Light west northwest wind increasing to 9 to 14 mph in the afternoon.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 62. West wind 5 to 9 mph becoming calm after midnight.

    Low: 62 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 89. Light west southwest wind becoming west northwest 6 to 11 mph in the afternoon.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 62. West wind 5 to 10 mph becoming light after midnight.

    Low: 62 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 66.

    Low: 66 °F

    Clear

  • Tuesday

    Tuesday: A slight chance of showers after 11am. Mostly sunny, with a high near 95.

    High: 95 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Partly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 63. Northwest wind 5 to 9 mph becoming calm after midnight.
Saturday
Sunny, with a high near 88. Light west northwest wind increasing to 9 to 14 mph in the afternoon.
Saturday Night
Clear, with a low around 62. West wind 5 to 9 mph becoming calm after midnight.
Sunday
Sunny, with a high near 89. Light west southwest wind becoming west northwest 6 to 11 mph in the afternoon.
Sunday Night
Clear, with a low around 62. West wind 5 to 10 mph becoming light after midnight.
Monday
Sunny, with a high near 95.
Monday Night
Clear, with a low around 66.
Tuesday
A slight chance of showers after 11am. Mostly sunny, with a high near 95.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 64.
Wednesday
A slight chance of showers before 11am. Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 61.
Friday
Sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brentwood CA
 37.93°N 121.7°W (Elev. 75 ft)
Last Update:
8:28 pm PDT Sep 19, 2025
Forecast Valid:
9pm PDT Sep 19, 2025-6pm PDT Sep 26, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation