Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

76°F

24°C

Humidity 44%
Wind Speed S 13 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Heat Index78°F (26°C)
Last update 04 Aug 11:28 AM PDT
Extended Forecast for

4 Miles S Clayton CA

Heat Advisory until August 4, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until August 4, 10:00pm

    NOW until 10:00pm Tue

    Heat Advisory

  • This Afternoon

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 71. Southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 71 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. South southwest wind 7 to 9 mph, with gusts as high as 18 mph.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 70. Southwest wind around 9 mph.

    Low: 70 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 83. West wind 5 to 9 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 70.

    Low: 70 °F

    Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 88. West southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Tonight
Clear, with a low around 71. Southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 85. South southwest wind 7 to 9 mph, with gusts as high as 18 mph.
Wednesday Night
Clear, with a low around 70. Southwest wind around 9 mph.
Thursday
Sunny, with a high near 83. West wind 5 to 9 mph.
Thursday Night
Clear, with a low around 68.
Friday
Sunny, with a high near 86.
Friday Night
Clear, with a low around 70.
Saturday
Sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Sunny, with a high near 86.
Sunday Night
Mostly clear, with a low around 71.
Monday
Sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
11:26 am PDT Aug 4, 2026
12pm PDT Aug 4, 2026-6pm PDT Aug 10, 2026
 
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