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Hazardous Weather Conditions
Current conditions at
BLACK DIAMOND (PIBC1)
Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.NA
88°F
31°C
| Humidity | 25% |
| Wind Speed | SSW 2 MPH |
| Barometer | NA |
| Dewpoint | 48°F (9°C) |
| Visibility | NA |
| Heat Index | 85°F (29°C) |
| Last update | 02 Oct 05:28 PM PDT |
Extended Forecast for
Clayton CA
Heat Advisory October 3, 12:27pm until October 7, 10:00pm
NOW until 10:00pm Wed

Heat Advisory
This Afternoon

High: 101 °F
Hot
Tonight

Low: 68 °F
Mostly Clear
Sunday

High: 100 °F
Hot
Sunday Night

Low: 66 °F
Mostly Clear
Monday

High: 102 °F
Hot
Monday Night

Low: 67 °F
Clear
Tuesday

High: 102 °F
Hot
Tuesday Night

Low: 67 °F
Clear
Detailed Forecast
This Afternoon
Sunny and hot, with a high near 101. North northeast wind around 6 mph.
Tonight
Mostly clear, with a low around 68. Calm wind.
Sunday
Mostly cloudy and hot, with a high near 100. Calm wind becoming east northeast around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 66. Calm wind.
Monday
Sunny and hot, with a high near 102. Calm wind becoming north around 6 mph in the afternoon.
Monday Night
Clear, with a low around 67.
Tuesday
Sunny and hot, with a high near 102.
Tuesday Night
Clear, with a low around 67.
Wednesday
Sunny and hot, with a high near 102.
Wednesday Night
Clear, with a low around 64.
Thursday
Sunny and hot, with a high near 100.
Thursday Night
Mostly clear, with a low around 62.
Friday
Sunny, with a high near 88.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Clayton CA
37.94°N 121.94°W (Elev. 400 ft)
37.94°N 121.94°W (Elev. 400 ft)
12:06 pm PDT Oct 3, 2026
12pm PDT Oct 3, 2026-6pm PDT Oct 9, 2026



