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

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

59°F

15°C

Humidity 28%
Wind Speed NW 12 MPH
Barometer NA
Dewpoint 26°F (-3°C)
Visibility NA
Last update 14 Mar 01:25 AM PDT
Extended Forecast for

3 Miles S Clayton CA

  • Overnight

    Overnight: Mostly clear, with a low around 52. West southwest wind around 11 mph, with gusts as high as 21 mph.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 74. West southwest wind 8 to 10 mph becoming north northwest in the morning. Winds could gust as high as 18 mph.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. West wind around 10 mph becoming north in the evening. Winds could gust as high as 18 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80. North wind 8 to 10 mph, with gusts as high as 21 mph.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61. North northwest wind 6 to 9 mph becoming west southwest in the evening. Winds could gust as high as 20 mph.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 52. West southwest wind around 11 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 74. West southwest wind 8 to 10 mph becoming north northwest in the morning. Winds could gust as high as 18 mph.
Saturday Night
Mostly clear, with a low around 56. West wind around 10 mph becoming north in the evening. Winds could gust as high as 18 mph.
Sunday
Sunny, with a high near 80. North wind 8 to 10 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 61. North northwest wind 6 to 9 mph becoming west southwest in the evening. Winds could gust as high as 20 mph.
Monday
Sunny, with a high near 83.
Monday Night
Clear, with a low around 64.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Clear, with a low around 65.
Wednesday
Sunny, with a high near 87.
Wednesday Night
Mostly clear, with a low around 64.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 67.
Friday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Clayton CA
 37.9°N 121.92°W (Elev. 1900 ft)
Last Update:
1:28 am PDT Mar 14, 2026
Forecast Valid:
3am PDT Mar 14, 2026-6pm PDT Mar 20, 2026
 
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