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

Severe Thunderstorms and Heavy Rainfall Today from the Central Plains into the Tennessee Valley

Severe thunderstorms capable of damaging winds will be possible from the Ozark Plateau east into portions of the Southeast today. Rounds of heavy thunderstorms ahead of a slow moving front will continue locally heavy rainfall and scattered flash flooding potential from the Ozarks to the Ohio and Tennessee Valleys today. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

74°F

23°C

Humidity 30%
Wind Speed SW 3 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 12 Jul 03:00 AM PDT
Extended Forecast for

20 Miles E Mount Hamilton CA

  • Overnight

    Overnight: A 20 percent chance of rain. Cloudy, with a steady temperature around 77. Light west wind.

    Low: 77 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A slight chance of rain between 8am and 10am. Mostly cloudy, with a high near 89. Light and variable wind becoming south southeast 5 to 7 mph in the morning. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 75. North wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Increasing
    Clouds

  • Monday

    Monday: A 20 percent chance of rain. Mostly cloudy, then gradually becoming sunny, with a high near 94. Light and variable wind becoming north northwest 5 to 9 mph in the afternoon.

    High: 94 °F

    Slight Chance
    Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. North northwest wind 5 to 9 mph becoming light and variable after midnight.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of rain. Cloudy, with a steady temperature around 77. Light west wind.
Sunday
A slight chance of rain between 8am and 10am. Mostly cloudy, with a high near 89. Light and variable wind becoming south southeast 5 to 7 mph in the morning. Chance of precipitation is 20%.
Sunday Night
Increasing clouds, with a low around 75. North wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of rain. Mostly cloudy, then gradually becoming sunny, with a high near 94. Light and variable wind becoming north northwest 5 to 9 mph in the afternoon.
Monday Night
Mostly clear, with a low around 76. North northwest wind 5 to 9 mph becoming light and variable after midnight.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Clear, with a low around 74.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Sunny, with a high near 94.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 94.
Friday Night
Mostly clear, with a low around 70.
Saturday
Sunny, with a high near 90.
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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 12, 2026
Forecast Valid:
3am PDT Jul 12, 2026-6pm PDT Jul 18, 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