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

42°F

6°C

Humidity 99%
Wind Speed SSW 12 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 27 Mar 02:25 PM PDT
Extended Forecast for

4 Miles S Clayton CA

  • This Afternoon

    This Afternoon: A 30 percent chance of rain. Partly sunny, with a steady temperature around 46. Southwest wind 18 to 21 mph, with gusts as high as 37 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Chance Rain

  • Tonight

    Tonight: A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 42. Southwest wind 14 to 16 mph, with gusts as high as 32 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Chance Rain

  • Friday

    Friday: Partly sunny, with a high near 47. West wind 13 to 17 mph, with gusts as high as 30 mph.

    High: 47 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 37. West southwest wind 11 to 16 mph, with gusts as high as 31 mph.

    Low: 37 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 51. West northwest wind around 9 mph, with gusts as high as 18 mph.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 42. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: Rain likely. Mostly cloudy, with a high near 50. Chance of precipitation is 70%.

    High: 50 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A chance of rain. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Chance Rain

  • Monday

    Monday: Rain likely, mainly after 11am. Mostly cloudy, with a high near 48.

    High: 48 °F

    Rain Likely

Detailed Forecast

This Afternoon
A 30 percent chance of rain. Partly sunny, with a steady temperature around 46. Southwest wind 18 to 21 mph, with gusts as high as 37 mph. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 42. Southwest wind 14 to 16 mph, with gusts as high as 32 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
Partly sunny, with a high near 47. West wind 13 to 17 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 37. West southwest wind 11 to 16 mph, with gusts as high as 31 mph.
Saturday
Mostly sunny, with a high near 51. West northwest wind around 9 mph, with gusts as high as 18 mph.
Saturday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 42. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain likely. Mostly cloudy, with a high near 50. Chance of precipitation is 70%.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 46.
Monday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 48.
Monday Night
A chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41.
Tuesday
A chance of rain. Partly sunny, with a high near 48.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 42.
Wednesday
A chance of rain. Partly sunny, with a high near 48.
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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 pm PDT Mar 27, 2025
Forecast Valid:
1pm PDT Mar 27, 2025-6pm PDT Apr 2, 2025
 
Forecast Discussion
 
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Additional Resources

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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