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

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

42°F

6°C

Humidity 97%
Wind Speed WNW 13 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 15 Apr 10:25 PM PDT
Extended Forecast for

4 Miles SSE Clayton CA

  • Tonight

    Tonight: Partly cloudy, with a low around 40. West wind 13 to 16 mph becoming north after midnight. Winds could gust as high as 30 mph.

    Low: 40 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 56. Breezy, with a north wind 16 to 22 mph, with gusts as high as 44 mph.

    High: 56 °F

    Sunny and
    Breezy then
    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 45. North northwest wind 13 to 21 mph, with gusts as high as 44 mph.

    Low: 45 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 61. North wind 9 to 14 mph, with gusts as high as 30 mph.

    High: 61 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 46. Northwest wind around 9 mph becoming southwest after midnight.

    Low: 46 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of rain, mainly after 11am. Partly sunny, with a high near 61.

    High: 61 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A chance of rain. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 40. West wind 13 to 16 mph becoming north after midnight. Winds could gust as high as 30 mph.
Thursday
Sunny, with a high near 56. Breezy, with a north wind 16 to 22 mph, with gusts as high as 44 mph.
Thursday Night
Clear, with a low around 45. North northwest wind 13 to 21 mph, with gusts as high as 44 mph.
Friday
Sunny, with a high near 61. North wind 9 to 14 mph, with gusts as high as 30 mph.
Friday Night
Mostly clear, with a low around 46. Northwest wind around 9 mph becoming southwest after midnight.
Saturday
Sunny, with a high near 64.
Saturday Night
Partly cloudy, with a low around 50.
Sunday
A chance of rain, mainly after 11am. Partly sunny, with a high near 61.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 49.
Monday
A chance of rain. Partly sunny, with a high near 58.
Monday Night
A chance of rain. Mostly cloudy, with a low around 50.
Tuesday
A chance of rain. Partly sunny, with a high near 54.
Tuesday Night
A slight chance of rain. Partly cloudy, with a low around 48.
Wednesday
Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
Last Update:
9:31 pm PDT Apr 15, 2026
Forecast Valid:
11pm PDT Apr 15, 2026-6pm PDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database Weather Element Forecast

Chance of Precipitation