Heavy to Excessive Rainfall and Flooding Threats in the Central and Eastern U.S.; Heat and Fire Weather Concerns in the West

Thunderstorms producing excessive rainfall and potential flooding concerns will continue through tonight from the Southern Plains to the East Coast. Areas of greatest concern for flooding are over central Texas and the Mid-Atlantic. Heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue through Monday. Read More >

Current conditions at

Mount Diablo Summit Museum and Trailhead Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

NA

79°F

26°C

Humidity 23%
Wind Speed WSW 5 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Heat Index78°F (26°C)
Last update 13 Jul 04:50 PM PDT
Extended Forecast for

3 Miles NNE San Ramon CA

  • Tonight

    Tonight: Mostly clear, with a low around 56. West wind 5 to 7 mph becoming calm  after midnight.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 91. Calm wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. West southwest wind 3 to 7 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. Light west southwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 56. West wind 5 to 7 mph becoming calm after midnight.
Monday
Sunny, with a high near 91. Calm wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Monday Night
Mostly clear, with a low around 55. West southwest wind 3 to 7 mph.
Tuesday
Sunny, with a high near 84. Light west southwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 55. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 82.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 55.
Saturday
Sunny, with a high near 84.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE San Ramon CA
 37.8°N 121.93°W (Elev. 640 ft)
2:42 pm PDT Jul 13, 2025
5pm PDT Jul 13, 2025-6pm PDT Jul 20, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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