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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and 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 41%
Wind Speed SSW 15 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Heat Index78°F (26°C)
Last update 18 Sep 05:28 PM PDT
Extended Forecast for

2 Miles SSW Clayton CA

  • Tonight

    Tonight: Mostly clear, with a low around 56. South southwest wind around 9 mph.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82. South wind 6 to 9 mph becoming west in the afternoon.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 56. Southwest wind 8 to 10 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 74. West southwest wind around 10 mph, with gusts as high as 18 mph.

    High: 74 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 56. South southwest wind around 9 mph.
Saturday
Sunny, with a high near 82. South wind 6 to 9 mph becoming west in the afternoon.
Saturday Night
Increasing clouds, with a low around 56. Southwest wind 8 to 10 mph.
Sunday
Partly sunny, with a high near 74. West southwest wind around 10 mph, with gusts as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 55. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 55.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
Last Update:
1:26 pm PDT Sep 18, 2026
Forecast Valid:
9pm PDT Sep 18, 2026-6pm PDT Sep 25, 2026
 
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Additional Resources

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Chance of Precipitation