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

Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

75°F

24°C

Humidity 29%
Wind Speed SSW 4 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 12 Aug 09:00 PM PDT
Extended Forecast for

19 Miles ENE Mount Hamilton CA

  • Tonight

    Tonight: Partly cloudy, with a low around 63. South wind 3 to 5 mph.

    Low: 63 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. West wind 5 to 7 mph becoming south southwest after midnight.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 75. Light and variable wind becoming south southeast 5 to 8 mph in the afternoon.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 59. West wind 5 to 7 mph becoming calm in the evening.

    Low: 59 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 63. South wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 78. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 59. West wind 5 to 7 mph becoming south southwest after midnight.
Friday
Sunny, with a high near 75. Light and variable wind becoming south southeast 5 to 8 mph in the afternoon.
Friday Night
Clear, with a low around 59. West wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
19 Miles ENE Mount Hamilton CA
 37.42°N 121.32°W (Elev. 2201 ft)
Last Update:
2:01 pm PDT Aug 12, 2026
Forecast Valid:
9pm PDT Aug 12, 2026-6pm PDT Aug 19, 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