Snow May Produce Poor Travel Conditions in the North-Central U.S. and East Coast

A strong cold front sweeping across the Northern Plains may bring snow showers and snow squalls from eastern Montana to north-central Nebraska, with blizzard conditions possible in eastern North Dakota and northwestern Montana. Heavy snow is expected to persist downwind of the Great Lakes. Snow showers will spread up the East Coast across the Mid-Atlantic and Northeast coasts. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

73°F

23°C

Humidity 8%
Wind Speed W 1 MPH
Barometer NA
Dewpoint 9°F (-13°C)
Visibility NA
Last update 18 Jan 12:20 PM PST
Extended Forecast for

3 Miles SSE Clayton CA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 60. East wind around 6 mph.

    High: 60 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 53. Light north wind.

    Low: 53 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 58. North wind around 6 mph.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42. East northeast wind 3 to 5 mph.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. Northeast wind around 7 mph.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 60. East wind around 6 mph.
Tonight
Partly cloudy, with a low around 53. Light north wind.
M.L.King Day
Sunny, with a high near 58. North wind around 6 mph.
Monday Night
Mostly clear, with a low around 42. East northeast wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 58. Northeast wind around 7 mph.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Partly sunny, with a high near 56.
Wednesday Night
Mostly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 58.
Thursday Night
Mostly clear, with a low around 44.
Friday
Mostly sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 42.
Saturday
Mostly sunny, with a high near 55.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Clayton CA
 37.9°N 121.9°W (Elev. 1814 ft)
12:26 pm PST Jan 18, 2026
12pm PST Jan 18, 2026-6pm PST Jan 24, 2026
 
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