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

68°F

20°C

Humidity 37%
Wind Speed SSE 5 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 05 Jul 04:00 AM PDT
Extended Forecast for

20 Miles E Mount Hamilton CA

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 86. Light and variable wind becoming east 5 to 8 mph in the morning.

    High: 86 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 61. North northeast wind 5 to 7 mph becoming light and variable in the evening.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 87. Light and variable wind becoming north northeast 5 to 8 mph in the morning.

    High: 87 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 60. North northwest wind 5 to 8 mph becoming light and variable in the evening.

    Low: 60 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. Light and variable wind becoming north 5 to 8 mph in the morning.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 86. Light and variable wind becoming east 5 to 8 mph in the morning.
Tonight
Mostly clear, with a low around 61. North northeast wind 5 to 7 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 87. Light and variable wind becoming north northeast 5 to 8 mph in the morning.
Monday Night
Clear, with a low around 60. North northwest wind 5 to 8 mph becoming light and variable in the evening.
Tuesday
Sunny, with a high near 87. Light and variable wind becoming north 5 to 8 mph in the morning.
Tuesday Night
Clear, with a low around 60.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Clear, with a low around 65.
Thursday
Sunny and hot, with a high near 96.
Thursday Night
Mostly clear, with a low around 68.
Friday
Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 68.
Saturday
Sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
20 Miles E Mount Hamilton CA
 37.38°N 121.28°W (Elev. 1401 ft)
Last Update:
2:00 am PDT Jul 5, 2026
Forecast Valid:
4am PDT Jul 5, 2026-6pm PDT Jul 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation