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

Dangerous Cold and Gusty Winds Anticipated This Weekend

A significant arctic outbreak will bring frigid temperatures and dangerously cold wind chills to the Northeast and Mid-Atlantic this weekend. Strong winds which could produce tree damage and power outages, and periods of snow squalls are also possible. Relief from this cold and a warming trend is forecast to commence by the beginning to middle of next week. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

58°F

14°C

Humidity 24%
Wind Speed SW 13 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Last update 06 Feb 01:50 AM PST
Extended Forecast for

Clayton CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 66. Calm wind becoming west around 6 mph in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 48. South southwest wind around 6 mph.

    Low: 48 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64. West wind around 6 mph.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 48. West southwest wind around 7 mph.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A slight chance of rain after 10pm. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 53. Calm wind.
Friday
Mostly sunny, with a high near 66. Calm wind becoming west around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 48. South southwest wind around 6 mph.
Saturday
Mostly sunny, with a high near 64. West wind around 6 mph.
Saturday Night
Partly cloudy, with a low around 48. West southwest wind around 7 mph.
Sunday
Partly sunny, with a high near 63.
Sunday Night
Mostly cloudy, with a low around 50.
Monday
Mostly cloudy, with a high near 60.
Monday Night
A slight chance of rain after 10pm. Mostly cloudy, with a low around 47.
Tuesday
A chance of rain, mainly after 10am. Partly sunny, with a high near 57.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 45.
Wednesday
A chance of rain. Partly sunny, with a high near 56.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 44.
Thursday
Sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
Last Update:
12:39 am PST Feb 6, 2026
Forecast Valid:
2am PST Feb 6, 2026-6pm PST Feb 12, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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