Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

38°F

3°C

Humidity 92%
Wind Speed N 3 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 27 Dec 11:35 AM PST
Extended Forecast for

7 Miles ENE Danville CA

  • Today

    Today: Mostly sunny, with a high near 46. North wind 6 to 8 mph.

    High: 46 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 37. North wind around 6 mph.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 47. North wind around 7 mph.

    High: 47 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. Northeast wind around 6 mph.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 49. Northeast wind around 8 mph.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain after 4pm.  Partly sunny, with a high near 51.

    High: 51 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 46. North wind 6 to 8 mph.
Tonight
Mostly clear, with a low around 37. North wind around 6 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 47. North wind around 7 mph.
Sunday Night
Mostly clear, with a low around 36. Northeast wind around 6 mph.
Monday
Sunny, with a high near 49. Northeast wind around 8 mph.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
A slight chance of rain after 4pm. Partly sunny, with a high near 51.
Wednesday Night
A chance of rain, mainly after 10pm. Mostly cloudy, with a low around 43.
New Year's Day
Rain likely. Mostly cloudy, with a high near 50.
Thursday Night
Rain likely. Mostly cloudy, with a low around 45.
Friday
A chance of rain. Partly sunny, with a high near 51.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles ENE Danville CA
 37.83°N 121.88°W (Elev. 1913 ft)
11:05 am PST Dec 27, 2025
11am PST Dec 27, 2025-6pm PST Jan 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database