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

Arctic Air for the Northeast and Mid-Atlantic; Increase Moisture for Pacific Northwest; Active Pattern for Hawaii

An arctic cold front will impact the Great Lakes, Northeast and mid-Atlantic. Snow showers and squalls will accompany this system with increasing winds and falling temperatures. Damaging wind gusts may result in tree damage and power outages. Meanwhile, moisture returns for the Pacific Northwest and Hawaii this weekend with both coverage and intensity of rainfall and higher elevation snows. 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 36%
Wind Speed WNW 4 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Last update 06 Feb 11:25 PM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Tonight

    Tonight: Mostly clear, with a low around 48. West wind around 9 mph.

    Low: 48 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 60. West northwest wind 5 to 8 mph.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 49. West wind around 9 mph.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: A 10 percent chance of rain after 4pm. Mostly sunny, with a high near 61. West wind 6 to 9 mph.

    High: 61 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: A 20 percent chance of rain before 10pm. Mostly cloudy, with a low around 52. West southwest wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 52 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 58.

    High: 58 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: A chance of rain. Mostly cloudy, with a high near 52.

    High: 52 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 48. West wind around 9 mph.
Saturday
Sunny, with a high near 60. West northwest wind 5 to 8 mph.
Saturday Night
Partly cloudy, with a low around 49. West wind around 9 mph.
Sunday
A 10 percent chance of rain after 4pm. Mostly sunny, with a high near 61. West wind 6 to 9 mph.
Sunday Night
A 20 percent chance of rain before 10pm. Mostly cloudy, with a low around 52. West southwest wind 11 to 13 mph, with gusts as high as 22 mph.
Monday
Mostly cloudy, with a high near 58.
Monday Night
A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 47.
Tuesday
A chance of rain. Mostly cloudy, with a high near 52.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 44.
Wednesday
A slight chance of rain. Partly sunny, with a high near 54.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 57.
Thursday Night
Mostly clear, with a low around 45.
Friday
A slight chance of rain. Mostly sunny, with a high near 55.
Basemap Options
Click map to change the forecast location
Loading map...
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:
2:55 pm PST Feb 6, 2026
Forecast Valid:
11pm PST Feb 6, 2026-6pm PST Feb 13, 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