Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

63°F

17°C

Humidity 30%
Wind Speed SSE 4 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 18 Apr 09:28 PM PDT
Extended Forecast for

Brentwood CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. West northwest wind 3 to 5 mph.

    Low: 53 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 78. Light west wind increasing to 5 to 10 mph in the afternoon.

    High: 78 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 48. West wind 5 to 9 mph becoming light and variable  after midnight.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of rain after 11am.  Mostly sunny, with a high near 75. Light south wind becoming south southwest 5 to 9 mph in the afternoon.  New precipitation amounts of less than a tenth of an inch possible.

    High: 75 °F

    Chance Rain

  • Monday Night

    Monday Night: Rain.  Low around 54. West southwest wind 5 to 10 mph becoming light and variable  after midnight. Winds could gust as high as 20 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 54 °F

    Rain

  • Tuesday

    Tuesday: Rain before 11am, then showers and possibly a thunderstorm after 11am.  High near 62. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 62 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 8pm, then rain, mainly between 8pm and 11pm.  Low around 50. Chance of precipitation is 80%.

    Low: 50 °F

    Showers then
    Chance Rain

  • Wednesday

    Wednesday: A chance of rain.  Mostly sunny, with a high near 66.

    High: 66 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 53. West northwest wind 3 to 5 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 78. Light west wind increasing to 5 to 10 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 48. West wind 5 to 9 mph becoming light and variable after midnight.
Monday
A 30 percent chance of rain after 11am. Mostly sunny, with a high near 75. Light south wind becoming south southwest 5 to 9 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Rain. Low around 54. West southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 62. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers and possibly a thunderstorm before 8pm, then rain, mainly between 8pm and 11pm. Low around 50. Chance of precipitation is 80%.
Wednesday
A chance of rain. Mostly sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 75.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Brentwood CA
 37.93°N 121.7°W (Elev. 75 ft)
8:46 pm PDT Apr 18, 2026
9pm PDT Apr 18, 2026-6pm PDT Apr 25, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database