Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

57°F

14°C

Humidity 50%
Wind Speed NNW 6 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 07 Dec 11:05 AM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Today

    Today: Partly sunny, with a steady temperature around 50. Calm wind becoming northwest 5 to 7 mph in the afternoon.

    High: 50 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 46. Calm wind becoming north northeast 5 to 9 mph in the evening.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 56. North wind 3 to 7 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. West wind around 5 mph.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 52. North wind 9 to 13 mph.

    High: 52 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a steady temperature around 50. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Tonight
Mostly clear, with a low around 46. Calm wind becoming north northeast 5 to 9 mph in the evening.
Monday
Sunny, with a high near 56. North wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 44. West wind around 5 mph.
Tuesday
Mostly sunny, with a high near 52. North wind 9 to 13 mph.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 56.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 54.
Thursday Night
Mostly clear, with a low around 45.
Friday
Sunny, with a high near 54.
Friday Night
Mostly clear, with a low around 44.
Saturday
Mostly sunny, with a high near 53.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
2:33 am PST Dec 7, 2025
11am PST Dec 7, 2025-6pm PST Dec 13, 2025
 
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