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

Hazardous Weather Conditions

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

90°F

32°C

Humidity 21%
Wind Speed SW 6 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Heat Index86°F (30°C)
Last update 04 Oct 05:28 PM PDT
Extended Forecast for

4 Miles SW Discovery Bay CA

Heat Advisory October 4, 08:49pm until October 7, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory October 4, 08:49pm until October 7, 10:00pm

    NOW until 10:00pm Wed

    Heat Advisory

  • Tonight

    Low: 68 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Calm wind becoming north around 5 mph.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 68. Calm wind.

    Low: 68 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 101. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 101 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 68. West northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 68 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 66.

    Low: 66 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 68. Calm wind.
Monday
Sunny and hot, with a high near 100. Calm wind becoming north around 5 mph.
Monday Night
Clear, with a low around 68. Calm wind.
Tuesday
Sunny and hot, with a high near 101. Calm wind becoming north northwest around 5 mph in the afternoon.
Tuesday Night
Clear, with a low around 68. West northwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
Clear, with a low around 66.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Clear, with a low around 63.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Discovery Bay CA
 37.87°N 121.63°W (Elev. 16 ft)
Last Update:
1:26 pm PDT Oct 4, 2026
Forecast Valid:
8pm PDT Oct 4, 2026-6pm PDT Oct 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation