National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tracking Winter Weather and Frigid Temperatures This Weekend

Another clipper will drop into the Northern Plains and Upper Midwest into Sunday with snow and gusty winds contributing to some areas of blizzard conditions and snow squalls. Impactful snowfall will occur up and down the East Coast Sunday extending from the western Florida Panhandle to Maine. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

64°F

18°C

Humidity 9%
Wind Speed NNW 5 MPH
Barometer NA
Dewpoint 6°F (-14°C)
Visibility NA
Last update 18 Jan 05:05 AM PST
Extended Forecast for

2 Miles SSW Clayton CA

  • Today

    Today: Mostly sunny, with a high near 62. Northeast wind around 6 mph.

    High: 62 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 60. North northeast wind around 6 mph.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. Northeast wind around 6 mph.

    High: 60 °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 59.

    High: 59 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 62. Northeast wind around 6 mph.
Tonight
Partly cloudy, with a low around 48. Calm wind.
M.L.King Day
Sunny, with a high near 60. North northeast wind around 6 mph.
Monday Night
Mostly clear, with a low around 43. Calm wind.
Tuesday
Mostly sunny, with a high near 60. Northeast wind around 6 mph.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Partly sunny, with a high near 59.
Wednesday Night
Mostly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 59.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 58.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
Last Update:
12:26 am PST Jan 18, 2026
Forecast Valid:
5am PST Jan 18, 2026-6pm PST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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Chance of Precipitation