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

48°F

9°C

Humidity 51%
Wind Speed NNE 8 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Wind Chill44°F (7°C)
Last update 12 Jan 06:28 AM PST
Extended Forecast for

2 Miles NW Brentwood CA

Cold Weather Advisory until January 12, 09:00am
Click here for hazard details and duration
...
  •  
    Cold Weather Advisory until January 12, 09:00am

    NOW until 9:00am Mon

    Cold Weather Advisory

  • Today

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 40 °F

    Mostly Clear

  • Wednesday

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

    High: 58 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 54. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 38. Calm wind.
Tuesday
Mostly sunny, with a high near 57. Calm wind becoming north northeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 40. Calm wind.
Wednesday
Mostly sunny, with a high near 58. Calm wind becoming northeast around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
Mostly sunny, with a high near 59.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Partly sunny, with a high near 60.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Brentwood CA
 37.95°N 121.71°W (Elev. 82 ft)
Last Update:
12:26 am PST Jan 12, 2026
Forecast Valid:
7am PST Jan 12, 2026-6pm PST Jan 18, 2026
 
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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