Heavy Rain in the Southern U.S.; Active Weather Continues in Alaska

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains today, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. Another Bering system will impact the Alaskan West Coast and Central Interior through the weekend bringing moderate to heavy snow, high winds, and/or some blizzard conditions. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

40°F

4°C

Humidity 99%
Wind Speed S 15 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 14 Feb 07:55 PM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Tonight

    Tonight: A 30 percent chance of rain after 4am.  Mostly cloudy, with a low around 44. South southeast wind 14 to 18 mph, with gusts as high as 28 mph.

    Low: 44 °F

    Chance Rain

  • Sunday

    Sunday: Rain, mainly after 1pm.  High near 52. Breezy, with a south wind 16 to 22 mph, with gusts as high as 31 mph.  Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Chance Rain
    then Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain.  Steady temperature around 47. South wind 10 to 16 mph, with gusts as high as 21 mph.  Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 47 °F

    Rain

  • Washington's Birthday

    Washington's Birthday: Rain.  High near 48. East wind around 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.  Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 48 °F

    Rain

  • Monday Night

    Monday Night: Rain before 1am, then rain and snow.  Low around 44. Breezy, with a west wind 18 to 22 mph, with gusts as high as 55 mph.  Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 44 °F

    Rain then
    Rain/Snow and
    Breezy

  • Tuesday

    Tuesday: Rain, possibly mixed with snow.  High near 49. Breezy.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 49 °F

    Rain/Snow and
    Breezy

  • Tuesday Night

    Tuesday Night: Rain and snow, becoming all snow after 7pm.  Low around 40. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 40 °F

    Rain/Snow
    then Snow
    Likely

  • Wednesday

    Wednesday: Snow likely before 1pm, then rain likely, possibly mixed with snow.  Mostly cloudy, with a high near 47.

    High: 47 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Rain and snow likely before 1am, then a chance of snow.  Mostly cloudy, with a low around 40.

    Low: 40 °F

    Rain/Snow
    Likely

Detailed Forecast

Tonight
A 30 percent chance of rain after 4am. Mostly cloudy, with a low around 44. South southeast wind 14 to 18 mph, with gusts as high as 28 mph.
Sunday
Rain, mainly after 1pm. High near 52. Breezy, with a south wind 16 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain. Steady temperature around 47. South wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Washington's Birthday
Rain. High near 48. East wind around 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Monday Night
Rain before 1am, then rain and snow. Low around 44. Breezy, with a west wind 18 to 22 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Tuesday
Rain, possibly mixed with snow. High near 49. Breezy. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday Night
Rain and snow, becoming all snow after 7pm. Low around 40. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday
Snow likely before 1pm, then rain likely, possibly mixed with snow. Mostly cloudy, with a high near 47.
Wednesday Night
Rain and snow likely before 1am, then a chance of snow. Mostly cloudy, with a low around 40.
Thursday
A chance of snow before 1pm, then a chance of rain and snow. Partly sunny, with a high near 47.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 39.
Friday
A chance of rain and snow. Partly sunny, with a high near 49.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 42.
Saturday
A chance of rain and snow. Partly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
5:18 pm PST Feb 14, 2026
8pm PST Feb 14, 2026-6pm PST Feb 21, 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