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

Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

50°F

10°C

Humidity 60%
Wind Speed N 8 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Wind Chill47°F (8°C)
Last update 12 Jan 04:28 PM PST
Extended Forecast for

Brentwood CA

Cold Weather Advisory January 13, 01:00am until January 13, 09:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 39. West wind around 5 mph becoming calm in the evening.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 59 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 40. Light north northwest wind.

    Low: 40 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 58. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 58 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 39. West wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 59. Calm wind becoming north northeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 40. Light north northwest wind.
Wednesday
Mostly sunny, with a high near 58. Calm wind becoming north northeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 40. Calm wind.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 42.
Saturday
Mostly sunny, with a high near 60.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 61.
Sunday Night
Partly cloudy, with a low around 43.
M.L.King Day
Partly sunny, with a high near 60.
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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:
12:41 pm PST Jan 12, 2026
Forecast Valid:
4pm PST Jan 12, 2026-6pm PST Jan 19, 2026
 
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Additional Resources

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Chance of Precipitation