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

Risks of Severe Thunderstorms and Excessive Rainfall; Fire Weather Concerns and Record Warmth

Severe thunderstorms and flash flooding risks increase across the center of the nation today. Meanwhile, ongoing thunderstorms and flash flooding will linger along the Gulf Coast states through the evening. The Great Basin and Intermountain West, warm temperatures and dry fuels with dry lightning may enhance fire weather potential. In addition, across interior Alaska, Red Flag Warning are posted. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

78°F

26°C

Humidity 39%
Wind Speed ENE 10 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Heat Index79°F (26°C)
Last update 20 Jun 06:00 PM PDT
Extended Forecast for

24 Miles ESE Mount Hamilton CA

  • Tonight

    Tonight: Mostly clear, with a low around 56. West southwest wind 6 to 9 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 85. Light and variable wind becoming southwest 5 to 9 mph in the afternoon.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 59. West southwest wind 7 to 9 mph.

    Low: 59 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 89. West southwest wind 5 to 7 mph becoming light and variable.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 62. West southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 62 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 56. West southwest wind 6 to 9 mph.
Sunday
Sunny, with a high near 85. Light and variable wind becoming southwest 5 to 9 mph in the afternoon.
Sunday Night
Clear, with a low around 59. West southwest wind 7 to 9 mph.
Monday
Sunny, with a high near 89. West southwest wind 5 to 7 mph becoming light and variable.
Monday Night
Clear, with a low around 62. West southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 92.
Tuesday Night
Clear, with a low around 64.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Clear, with a low around 64.
Thursday
Sunny, with a high near 91.
Thursday Night
Clear, with a low around 61.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
24 Miles ESE Mount Hamilton CA
 37.26°N 121.22°W (Elev. 1512 ft)
Last Update:
2:00 pm PDT Jun 20, 2026
Forecast Valid:
6pm PDT Jun 20, 2026-6pm PDT Jun 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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