Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

88°F

31°C

Humidity 16%
Wind Speed E 8 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Heat Index84°F (29°C)
Last update 27 Aug 01:00 PM PDT
Extended Forecast for

21 Miles E Mount Hamilton CA

  • This Afternoon

    This Afternoon: A 20 percent chance of rain.  Mostly cloudy, with a high near 92. North northeast wind around 8 mph.

    High: 92 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain.  Patchy smoke between 2am and 3am. Mostly cloudy, with a low around 74. Light and variable wind.

    Low: 74 °F

    Slight Chance
    Rain

  • Friday

    Friday: A slight chance of rain before 11am, then a slight chance of rain after 2pm.  Cloudy, then gradually becoming mostly sunny, with a high near 86. Light and variable wind becoming east northeast 5 to 9 mph in the morning.  Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 64. North wind around 6 mph becoming calm  in the evening.

    Low: 64 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 88. Calm wind becoming north 5 to 9 mph in the afternoon.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of rain. Mostly cloudy, with a high near 92. North northeast wind around 8 mph.
Tonight
A 20 percent chance of rain. Patchy smoke between 2am and 3am. Mostly cloudy, with a low around 74. Light and variable wind.
Friday
A slight chance of rain before 11am, then a slight chance of rain after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 86. Light and variable wind becoming east northeast 5 to 9 mph in the morning. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 64. North wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 88. Calm wind becoming north 5 to 9 mph in the afternoon.
Saturday Night
Clear, with a low around 59.
Sunday
Sunny, with a high near 86.
Sunday Night
Clear, with a low around 58.
Monday
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 55.
Tuesday
Sunny, with a high near 80.
Tuesday Night
A slight chance of rain. Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
21 Miles E Mount Hamilton CA
 37.41°N 121.26°W (Elev. 1007 ft)
11:31 am PDT Aug 27, 2026
1pm PDT Aug 27, 2026-6pm PDT Sep 2, 2026
 
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Additional Resources

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