Showers and Storms in the East; Dangerously Hot and Dry in the West

Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >

Hazardous Weather Conditions

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

99°F

37°C

Humidity 17%
Wind Speed ENE 8 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Heat Index95°F (35°C)
Last update 09 Aug 02:00 PM PDT
Extended Forecast for

20 Miles E Mount Hamilton CA

Heat Advisory August 9, 02:37pm until August 9, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 9, 02:37pm until August 9, 10:00pm

    NOW until 10:00pm Sun

    Heat Advisory

  • This Afternoon

    High: 99 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 75. Light and variable wind becoming west around 6 mph.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 96. Light and variable wind becoming southeast 5 to 8 mph in the morning.

    High: 96 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 69. North wind around 5 mph becoming light and variable  in the evening.

    Low: 69 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Light and variable wind becoming west southwest 5 to 8 mph in the morning.

    High: 93 °F

    Sunny

  • Tuesday Night

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

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 99. Northeast wind around 7 mph.
Tonight
Mostly clear, with a low around 75. Light and variable wind becoming west around 6 mph.
Monday
Sunny and hot, with a high near 96. Light and variable wind becoming southeast 5 to 8 mph in the morning.
Monday Night
Mostly clear, with a low around 69. North wind around 5 mph becoming light and variable in the evening.
Tuesday
Sunny, with a high near 93. Light and variable wind becoming west southwest 5 to 8 mph in the morning.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 91.
Wednesday Night
Partly cloudy, with a low around 64.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 59.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 87.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
20 Miles E Mount Hamilton CA
 37.38°N 121.28°W (Elev. 1401 ft)
2:01 pm PDT Aug 9, 2026
2pm PDT Aug 9, 2026-6pm PDT Aug 15, 2026
 
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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