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

Tracking Winter Weather and Frigid Temperatures Through This Weekend

A clipper storm will move across the Great Lakes through this weekend with periods of light snow, gusty winds, and lake effect snow bands which could make for hazardous travel at times. A frigid airmass will spread eastward behind this storm into the Midwest and Eastern U.S. through the weekend. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

56°F

13°C

Humidity 20%
Wind Speed N 16 MPH
Barometer NA
Dewpoint 16°F (-9°C)
Visibility NA
Last update 16 Jan 07:05 AM PST
Extended Forecast for

Clayton CA

  • Today

    Today: Sunny, with a high near 62. Northeast wind around 7 mph.

    High: 62 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 46. Calm wind becoming east around 5 mph after midnight.

    Low: 46 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 60. Northeast wind around 7 mph.

    High: 60 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 45. Light east northeast wind.

    Low: 45 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 60. Northeast wind around 6 mph.

    High: 60 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 62. Northeast wind around 7 mph.
Tonight
Mostly clear, with a low around 46. Calm wind becoming east around 5 mph after midnight.
Saturday
Mostly sunny, with a high near 60. Northeast wind around 7 mph.
Saturday Night
Mostly cloudy, with a low around 45. Light east northeast wind.
Sunday
Partly sunny, with a high near 60. Northeast wind around 6 mph.
Sunday Night
Mostly clear, with a low around 43.
M.L.King Day
Sunny, with a high near 59.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Mostly sunny, with a high near 59.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 56.
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:
12:26 am PST Jan 16, 2026
Forecast Valid:
7am PST Jan 16, 2026-6pm PST Jan 22, 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