Tracking Late Season Winter Storms; Unusual Early-Season Heat Wave in the Southwest

Heavy snow and high winds continue in the Great Lakes and Northeast. A moderate atmospheric river will continue to bring heavy precipitation to the Pacific Northwest and northern Rockies. A major winter storm will develop across the northern High Plains tonight into Saturday and rapidly strengthen as it moves into the Great Lakes on Sunday. Above-average temperatures expected in the Southwest. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

68°F

20°C

Humidity 17%
Wind Speed WNW 0 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Last update 13 Mar 11:35 AM PDT
Extended Forecast for

4 Miles S Clayton CA

  • Tonight

    Tonight: Partly cloudy, with a low around 53. West wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74. West wind 9 to 11 mph becoming north in the morning. Winds could gust as high as 21 mph.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59. West wind around 11 mph, with gusts as high as 22 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 80. North wind 9 to 11 mph, with gusts as high as 22 mph.

    High: 80 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66. North northwest wind 6 to 10 mph becoming west southwest in the evening. Winds could gust as high as 21 mph.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 70.

    Low: 70 °F

    Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 53. West wind 11 to 14 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 74. West wind 9 to 11 mph becoming north in the morning. Winds could gust as high as 21 mph.
Saturday Night
Mostly clear, with a low around 59. West wind around 11 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 80. North wind 9 to 11 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 66. North northwest wind 6 to 10 mph becoming west southwest in the evening. Winds could gust as high as 21 mph.
Monday
Sunny, with a high near 84.
Monday Night
Clear, with a low around 68.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Clear, with a low around 70.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Clear, with a low around 69.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 70.
Friday
Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
1:54 pm PDT Mar 13, 2026
7pm PDT Mar 13, 2026-6pm PDT Mar 20, 2026
 
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Additional Resources

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