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

Heavy Snow in the Central/Southern Rockies; Below Average Temperatures in the Central and Eastern US

Moderate to heavy snowfall is expected in the central/southern Rockies and adjacent High Plains today. Lake-enhanced snowfall is expected downwind of the Great Lakes today. Showers and thunderstorms will be possible this evening into tonight across the western Gulf Coast states. Temperatures across much of the central and eastern CONUS will remain below average and chilly to end the week. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

38°F

3°C

Humidity 57%
Wind Speed N 26 MPH
Barometer NA
Dewpoint 25°F (-4°C)
Visibility NA
Wind Chill27°F (-3°C)
Last update 03 Dec 06:05 AM PST
Extended Forecast for

4 Miles S Clayton CA

  • Today

    Today: Mostly sunny, with a high near 49. North northeast wind 15 to 17 mph, with gusts as high as 31 mph.

    High: 49 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a steady temperature around 44. North northeast wind 6 to 13 mph, with gusts as high as 22 mph.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 48. East northeast wind around 7 mph.

    High: 48 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. North northwest wind 3 to 5 mph.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 53. North wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 53 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 49. North northeast wind 15 to 17 mph, with gusts as high as 31 mph.
Tonight
Partly cloudy, with a steady temperature around 44. North northeast wind 6 to 13 mph, with gusts as high as 22 mph.
Thursday
Sunny, with a high near 48. East northeast wind around 7 mph.
Thursday Night
Mostly clear, with a low around 43. North northwest wind 3 to 5 mph.
Friday
Sunny, with a high near 53. North wind 9 to 11 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 46.
Sunday
Mostly sunny, with a high near 53.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Mostly sunny, with a high near 54.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Mostly sunny, with a high near 53.
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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:
12:39 am PST Dec 3, 2025
Forecast Valid:
6am PST Dec 3, 2025-6pm PST Dec 9, 2025
 
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Additional Resources

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