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

Mount Diablo Summit Museum and Trailhead Rooftop (SJS02)

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

NA

73°F

23°C

Humidity 23%
Wind Speed S 6 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 16 Jul 01:50 AM PDT
Extended Forecast for

4 Miles S Clayton CA

  • Overnight

    Overnight: A chance of rain before 3am, then a chance of drizzle after 3am. Partly cloudy, with a steady temperature around 65. South southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.

    Low: 65 °F

    Chance Rain

  • Wednesday

    Wednesday: A slight chance of drizzle before 11am. Sunny, with a high near 70. South southwest wind 8 to 11 mph, with gusts as high as 22 mph.

    High: 70 °F

    Slight Chance
    Drizzle then
    Sunny

  • Wednesday Night

    Wednesday Night: A chance of drizzle, mainly after 11pm. Mostly cloudy, with a low around 61. Southwest wind around 10 mph, with gusts as high as 23 mph.

    Low: 61 °F

    Chance
    Drizzle

  • Thursday

    Thursday: Sunny, with a high near 72. West southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. West southwest wind around 10 mph, with gusts as high as 21 mph.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of rain before 3am, then a chance of drizzle after 3am. Partly cloudy, with a steady temperature around 65. South southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Wednesday
A slight chance of drizzle before 11am. Sunny, with a high near 70. South southwest wind 8 to 11 mph, with gusts as high as 22 mph.
Wednesday Night
A chance of drizzle, mainly after 11pm. Mostly cloudy, with a low around 61. Southwest wind around 10 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 72. West southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Thursday Night
Mostly clear, with a low around 63. West southwest wind around 10 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny, with a high near 77.
Sunday Night
Mostly clear, with a low around 63.
Monday
Sunny, with a high near 71.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
Last Update:
1:26 am PDT Jul 16, 2025
Forecast Valid:
2am PDT Jul 16, 2025-6pm PDT Jul 22, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation