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

DIABLO GRANDE (DBLC1)

Lat: 37.32927°NLon: 121.29538°WElev: 1861.0ft.

NA

85°F

29°C

Humidity 26%
Wind Speed E 7 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Heat Index82°F (28°C)
Last update 04 Jul 05:00 PM PDT
Extended Forecast for

14 Miles NE Mount Hamilton CA

  • Tonight

    Tonight: Increasing clouds, with a low around 57. Southwest wind 3 to 6 mph.

    Low: 57 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 79. Southwest wind 5 to 7 mph becoming northeast in the afternoon.

    High: 79 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53. West southwest wind around 5 mph.

    Low: 53 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79. Light and variable wind becoming northwest 5 to 7 mph in the afternoon.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 51. West southwest wind around 6 mph.

    Low: 51 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 51.

    Low: 51 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 57. Southwest wind 3 to 6 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 79. Southwest wind 5 to 7 mph becoming northeast in the afternoon.
Sunday Night
Mostly clear, with a low around 53. West southwest wind around 5 mph.
Monday
Sunny, with a high near 79. Light and variable wind becoming northwest 5 to 7 mph in the afternoon.
Monday Night
Clear, with a low around 51. West southwest wind around 6 mph.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Clear, with a low around 51.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Clear, with a low around 56.
Thursday
Sunny, with a high near 87.
Thursday Night
Clear, with a low around 57.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
14 Miles NE Mount Hamilton CA
 37.49°N 121.48°W (Elev. 2799 ft)
Last Update:
2:00 pm PDT Jul 4, 2026
Forecast Valid:
5pm PDT Jul 4, 2026-6pm PDT Jul 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation