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

Showers and Thunderstorms in the Southwest and Ohio Valley; Mountain Snow in the Northeast

Showers and thunderstorms, along with high-elevation snow, will begin to develop over parts of the Southwest late tonight and is expected to continue through Wednesday morning. Mountain snow over parts the Northeast will continue through Tuesday. A few strong to severe storms and heavy rainfall are possible across portions of the Lower Ohio Valley Tuesday. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

47°F

8°C

Humidity 100%
Wind Speed SSE 8 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Wind Chill43°F (6°C)
Last update 17 Nov 05:28 PM PST
Extended Forecast for

Brentwood CA

  • Tonight

    Tonight: A 30 percent chance of showers before 10pm. Mostly cloudy, with a low around 46. South southeast wind 5 to 9 mph becoming calm after midnight. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: Patchy fog between 7am and 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 62. Light west wind increasing to 5 to 10 mph in the afternoon.

    High: 62 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 47. Southwest wind 5 to 8 mph becoming calm in the evening.

    Low: 47 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 61. Light east southeast wind.

    High: 61 °F

    Patchy Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 4am. Mostly cloudy, with a low around 51. Light south southeast wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely, mainly before 10am. Mostly cloudy, with a high near 58. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of rain before 10pm. Partly cloudy, with a low around 47.

    Low: 47 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Tonight
A 30 percent chance of showers before 10pm. Mostly cloudy, with a low around 46. South southeast wind 5 to 9 mph becoming calm after midnight. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Patchy fog between 7am and 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 62. Light west wind increasing to 5 to 10 mph in the afternoon.
Tuesday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 47. Southwest wind 5 to 8 mph becoming calm in the evening.
Wednesday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 61. Light east southeast wind.
Wednesday Night
Rain likely, mainly after 4am. Mostly cloudy, with a low around 51. Light south southeast wind. 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 58. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 20 percent chance of rain before 10pm. Partly cloudy, with a low around 47.
Friday
Sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 63.
Saturday Night
Mostly clear, with a low around 45.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 62.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Mostly sunny, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Brentwood CA
 37.93°N 121.7°W (Elev. 75 ft)
Last Update:
12:26 pm PST Nov 17, 2025
Forecast Valid:
6pm PST Nov 17, 2025-6pm PST Nov 24, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation