Monitoring Tsunami Impacts Across the Pacific; Air Quality Concerns; Dangerous Heat; Critical Fire Weather for the West

Tsunami impacts continue for portions of the Pacific basin. Wildfire smoke causes unhealthy air in Midwest to Great Lakes. Heat dome spans Mississippi Valley to Mid-Atlantic with excessive heat warnings and advisories. Critical fire weather in Great Basin to Pacific Northwest (dry thunderstorms). Cold front spawns severe storms/heavy rain in Central U.S. today, shifts to East Coast Thursday. Read More >

Current conditions at

Mount Diablo Summit Museum and Trailhead Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

NA

77°F

25°C

Humidity 23%
Wind Speed WNW 1 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Heat Index77°F (25°C)
Last update 30 Jul 08:50 AM PDT
Extended Forecast for

4 Miles SSE Clayton CA

  • Today

    Today: Sunny, with a high near 72. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. South southwest wind around 11 mph, with gusts as high as 23 mph.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 74. Southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. Southwest wind around 10 mph, with gusts as high as 22 mph.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 75. Southwest wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 72. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 64. South southwest wind around 11 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 74. Southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Thursday Night
Mostly clear, with a low around 63. Southwest wind around 10 mph, with gusts as high as 22 mph.
Friday
Sunny, with a high near 75. Southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 76.
Saturday Night
Clear, with a low around 61.
Sunday
Sunny, with a high near 72.
Sunday Night
Clear, with a low around 61.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
5:10 am PDT Jul 30, 2025
9am PDT Jul 30, 2025-6pm PDT Aug 5, 2025
 
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