Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast across parts of the Upper Midwest into the Great Lakes, the Northeast, and the central High Plains. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

N/A

Humidity 28%
Wind Speed NW 9 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update 17 May 05:05 PM PDT
Extended Forecast for

3 Miles SSE Clayton CA

  • Today

    Today: Sunny, with a high near 75. South wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 21 mph.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. South southwest wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 75. South southwest wind 5 to 10 mph, with gusts as high as 21 mph.

    High: 75 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 77. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

  • Independence Day

    Independence Day: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 75. South wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 21 mph.
Tonight
Mostly clear, with a low around 56. South southwest wind 10 to 14 mph, with gusts as high as 24 mph.
Thursday
Mostly sunny, with a high near 75. South southwest wind 5 to 10 mph, with gusts as high as 21 mph.
Thursday Night
Mostly clear, with a low around 57. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Friday
Sunny, with a high near 77. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Friday Night
Clear, with a low around 59.
Independence Day
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 73.
Sunday Night
Mostly clear, with a low around 58.
Monday
Sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Clayton CA
 37.9°N 121.9°W (Elev. 1814 ft)
11:27 am PDT Jul 1, 2026
11am PDT Jul 1, 2026-6pm PDT Jul 7, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database