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

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

76°F

24°C

Humidity 29%
Wind Speed S 10 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Heat Index77°F (25°C)
Last update 29 Jul 09:28 PM PDT
Extended Forecast for

Clayton CA

  • Tonight

    Tonight: Clear, with a low around 58. South southwest wind around 11 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. South southwest wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 96. West southwest wind 6 to 8 mph.

    High: 96 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 59. Southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 59 °F

    Clear

  • Saturday

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

    High: 98 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

Detailed Forecast

Tonight
Clear, with a low around 58. South southwest wind around 11 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 91. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.
Thursday Night
Mostly clear, with a low around 57. South southwest wind 9 to 11 mph, with gusts as high as 21 mph.
Friday
Sunny and hot, with a high near 96. West southwest wind 6 to 8 mph.
Friday Night
Clear, with a low around 59. Southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Saturday
Sunny and hot, with a high near 98.
Saturday Night
Clear, with a low around 60.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
Clear, with a low around 60.
Monday
Sunny and hot, with a high near 98.
Monday Night
Clear, with a low around 62.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Clear, with a low around 60.
Wednesday
Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.94°N 121.96°W (Elev. 400 ft)
Last Update:
8:52 pm PDT Jul 29, 2026
Forecast Valid:
10pm PDT Jul 29, 2026-6pm PDT Aug 5, 2026
 
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Additional Resources

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