Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

52°F

11°C

Humidity 31%
Wind Speed N 16 MPH
Barometer NA
Dewpoint 23°F (-5°C)
Visibility NA
Last update 19 Jan 07:50 AM PST
Extended Forecast for

2 Miles SSE Clayton CA

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 62. Northeast wind 3 to 6 mph.

    High: 62 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 42. Light east northeast wind.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62. East northeast wind around 6 mph.

    High: 62 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 61. Northeast wind 3 to 5 mph.

    High: 61 °F

    Partly Sunny

  • Wednesday Night

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

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

Detailed Forecast

M.L.King Day
Sunny, with a high near 62. Northeast wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 42. Light east northeast wind.
Tuesday
Mostly sunny, with a high near 62. East northeast wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 46. Calm wind.
Wednesday
Partly sunny, with a high near 61. Northeast wind 3 to 5 mph.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 46.
Friday
Mostly sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 44.
Saturday
Mostly sunny, with a high near 60.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Mostly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Clayton CA
 37.92°N 121.93°W (Elev. 600 ft)
12:26 am PST Jan 19, 2026
8am PST Jan 19, 2026-6pm PST Jan 25, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database