Heavy Mountain Snow in the Northwest U.S.; Wintry Mix in the Northeast U.S.
Two more cold fronts will pass through the Northwest U.S. this week with heavy mountain snow continuing across the Cascades, and northern Rockies. A quick moving storm system will bring mixed precipitation including some freezing rain across the Northeast U.S. overnight into Wednesday. Read More >
Current conditions at
SJSU - Mount Diablo Summit Museum Rooftop (SJS02)
Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.NA
44°F
7°C
| Humidity | 88% |
| Wind Speed | SSW 3 MPH |
| Barometer | NA |
| Dewpoint | 40°F (4°C) |
| Visibility | NA |
| Last update | 06 Jan 08:05 PM PST |
Extended Forecast for
4 Miles SSE Clayton CA
Tonight
Low: 42 °F
Mostly Cloudy
Wednesday
High: 47 °F
Mostly Sunny
Wednesday Night
Low: 35 °F
Mostly Clear
Thursday
High: 46 °F
Sunny
Thursday Night
Low: 35 °F
Mostly Clear
Friday
High: 45 °F
Sunny
Friday Night
Low: 35 °F
Partly Cloudy
Saturday
High: 48 °F
Mostly Sunny
Saturday Night
Low: 38 °F
Mostly Cloudy
Detailed Forecast
Tonight
Mostly cloudy, with a low around 42. West wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 47. West wind 9 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 35. West wind 14 to 17 mph, with gusts as high as 33 mph.
Thursday
Sunny, with a high near 46. North northwest wind 11 to 14 mph, with gusts as high as 24 mph.
Thursday Night
Mostly clear, with a low around 35. North wind around 9 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 45.
Friday Night
Partly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 48.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Partly sunny, with a high near 49.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 53.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
4 Miles SSE Clayton CA
37.87°N 121.92°W (Elev. 2818 ft)
37.87°N 121.92°W (Elev. 2818 ft)
12:26 pm PST Jan 6, 2026
8pm PST Jan 6, 2026-6pm PST Jan 13, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
