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

40°F

4°C

Humidity 99%
Wind Speed W 14 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 16 Apr 02:40 AM PDT
Extended Forecast for

4 Miles SSE Clayton CA

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 43. North wind around 14 mph, with gusts as high as 26 mph.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 54. Breezy, with a north wind 16 to 22 mph, with gusts as high as 44 mph.

    High: 54 °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 60. North wind 9 to 14 mph, with gusts as high as 30 mph.

    High: 60 °F

    Sunny

  • Friday Night

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

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of rain. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance Rain

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 43. North wind around 14 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 54. 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 60. North wind 9 to 14 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 46. Northwest wind around 9 mph becoming southwest after midnight.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
Mostly cloudy, with a low around 49.
Sunday
Partly sunny, with a high near 62.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 50.
Monday
A chance of rain. Mostly cloudy, with a high near 56.
Monday Night
A chance of rain. Mostly cloudy, with a low around 49.
Tuesday
A chance of rain. Partly sunny, with a high near 52.
Tuesday Night
A slight chance of rain. Partly cloudy, with a low around 47.
Wednesday
Mostly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
Last Update:
1:46 am PDT Apr 16, 2026
Forecast Valid:
3am PDT Apr 16, 2026-6pm PDT Apr 22, 2026
 
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