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

Heavy Rainfall for the Mid-Atlantic; Heat and Wildfire Concerns for the West

Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region today into tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the interior Northwest with dry and breezy conditions. Watching the tropics across the Southeast. Read More >

Current conditions at

Mount Diablo Summit Museum and Trailhead Rooftop (SJS02)

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

NA

83°F

28°C

Humidity 24%
Wind Speed WNW 1 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Heat Index81°F (27°C)
Last update 14 Jul 01:20 PM PDT
Extended Forecast for

3 Miles N San Ramon CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 88. West southwest wind around 8 mph, with gusts as high as 18 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. West southwest wind 3 to 7 mph.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. West southwest wind 5 to 9 mph, with gusts as high as 21 mph.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 55. West southwest wind 5 to 8 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 78. West southwest wind 5 to 8 mph, with gusts as high as 18 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 88. West southwest wind around 8 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 56. West southwest wind 3 to 7 mph.
Tuesday
Sunny, with a high near 82. West southwest wind 5 to 9 mph, with gusts as high as 21 mph.
Tuesday Night
Increasing clouds, with a low around 55. West southwest wind 5 to 8 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 78. West southwest wind 5 to 8 mph, with gusts as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N San Ramon CA
 37.8°N 121.96°W (Elev. 604 ft)
Last Update:
1:26 pm PDT Jul 14, 2025
Forecast Valid:
1pm PDT Jul 14, 2025-6pm PDT Jul 20, 2025
 
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