Arctic Front Brings Winter Weather and Colder Temperatures to the Eastern U.S.

A series of cold fronts will bring heavy lake effect snow to the northern Great Lakes. The fronts will merge over the Ohio Valley and bring colder temperatures east of the Mississippi River later today into the end of the week. Additionally, wintry weather will develop over the Ohio Valley, Appalachians, and Northeast as rain switches over to snow tonight into Thursday morning. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

65°F

18°C

Humidity 15%
Wind Speed N 5 MPH
Barometer NA
Dewpoint 17°F (-8°C)
Visibility NA
Last update 14 Jan 12:50 PM PST
Extended Forecast for

4 Miles S Clayton CA

  • This Afternoon

    This Afternoon: Sunny, with a steady temperature around 58. East northeast wind around 8 mph.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a steady temperature around 53. East wind around 9 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 59. East wind 7 to 9 mph.

    High: 59 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. East northeast wind around 6 mph.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 56. Northeast wind around 8 mph.

    High: 56 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a steady temperature around 58. East northeast wind around 8 mph.
Tonight
Mostly clear, with a steady temperature around 53. East wind around 9 mph.
Thursday
Sunny, with a high near 59. East wind 7 to 9 mph.
Thursday Night
Mostly clear, with a low around 43. East northeast wind around 6 mph.
Friday
Sunny, with a high near 56. Northeast wind around 8 mph.
Friday Night
Mostly clear, with a low around 42.
Saturday
Sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 42.
M.L.King Day
Sunny, with a high near 54.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Mostly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
12:26 pm PST Jan 14, 2026
1pm PST Jan 14, 2026-6pm PST Jan 20, 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