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

Mt. Diablo (SJS02)

Lat: 37.881698°NLon: 121.914155°WElev: 3849.0ft.

NA

65°F

18°C

Humidity 37%
Wind Speed ESE 6 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 25 Mar 11:25 AM PDT
Extended Forecast for

4 Miles S Clayton CA

  • Today

    Today: Mostly sunny, with a high near 75. East southeast wind 6 to 8 mph becoming northeast in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 50. Northwest wind 7 to 15 mph becoming south southwest in the evening. Winds could gust as high as 28 mph.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a steady temperature around 53. Southwest wind around 18 mph, with gusts as high as 34 mph.

    High: 53 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 48. Southwest wind around 18 mph, with gusts as high as 34 mph.

    Low: 48 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain. Partly sunny, with a high near 50. Southwest wind 16 to 18 mph, with gusts as high as 34 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of rain. Mostly sunny, with a high near 49.

    High: 49 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 75. East southeast wind 6 to 8 mph becoming northeast in the afternoon.
Tonight
Partly cloudy, with a low around 50. Northwest wind 7 to 15 mph becoming south southwest in the evening. Winds could gust as high as 28 mph.
Wednesday
Mostly sunny, with a steady temperature around 53. Southwest wind around 18 mph, with gusts as high as 34 mph.
Wednesday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 48. Southwest wind around 18 mph, with gusts as high as 34 mph.
Thursday
A 20 percent chance of rain. Partly sunny, with a high near 50. Southwest wind 16 to 18 mph, with gusts as high as 34 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Partly cloudy, with a low around 42.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 49.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 52.
Saturday Night
A chance of rain after 11pm. Mostly cloudy, with a low around 43.
Sunday
Rain likely. Mostly cloudy, with a high near 48.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 45.
Monday
A chance of rain. Partly sunny, with a high near 51.
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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 Mar 25, 2025
Forecast Valid:
10am PDT Mar 25, 2025-6pm PDT Mar 31, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation