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

Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. 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

4 Miles SSE Clayton CA

  • Tonight

    Tonight: Partly cloudy, with a low around 59. Southwest wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 70. Southwest wind 10 to 13 mph, with gusts as high as 23 mph.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. Southwest wind around 14 mph, with gusts as high as 25 mph.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 69. West southwest wind 10 to 13 mph, with gusts as high as 23 mph.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. Southwest wind 13 to 16 mph, with gusts as high as 26 mph.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 59. Southwest wind 11 to 13 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 70. Southwest wind 10 to 13 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 56. Southwest wind around 14 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 69. West southwest wind 10 to 13 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 54. Southwest wind 13 to 16 mph, with gusts as high as 26 mph.
Tuesday
Sunny, with a high near 68.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Clear, with a low around 59.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 58.
Friday
Sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 59.
Saturday
Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.9°N 121.92°W (Elev. 1900 ft)
Last Update:
1:26 pm PDT Jul 4, 2026
Forecast Valid:
8pm PDT Jul 4, 2026-6pm PDT Jul 11, 2026
 
Forecast Discussion
 
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Additional Resources

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