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

Lala Impacting Hawaii; Flash Flooding Risks; Excessive Heat

Lala will continue to impact Hawaii through the weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Thunderstorms, heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians and the mid-Atlantic through today. Record heat continues for areas of the Mississippi Valley into the Southeast. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

65°F

18°C

Humidity 61%
Wind Speed W 3 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 16 Aug 06:00 AM PDT
Extended Forecast for

20 Miles E Mount Hamilton CA

  • Today

    Today: Sunny, with a high near 90. Calm wind becoming northeast 5 to 9 mph in the morning.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 67. North wind 5 to 7 mph becoming calm after midnight.

    Low: 67 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 90. Calm wind becoming east northeast 5 to 8 mph in the morning.

    High: 90 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91. Calm wind becoming north 5 to 8 mph in the afternoon.

    High: 91 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 90. Calm wind becoming northeast 5 to 9 mph in the morning.
Tonight
Increasing clouds, with a low around 67. North wind 5 to 7 mph becoming calm after midnight.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 90. Calm wind becoming east northeast 5 to 8 mph in the morning.
Monday Night
Partly cloudy, with a low around 65. North northwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 91. Calm wind becoming north 5 to 8 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 64.
Saturday
Sunny, with a high near 88.
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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 Aug 16, 2026
Forecast Valid:
6am PDT Aug 16, 2026-6pm PDT Aug 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation