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

Tracking Weekend Storm Impacts

A storm and trailing cold front will continue to slowly move through the Gulf Coast and Southeast U.S. through this weekend with widespread rain showers and isolated thunderstorms. Some snow and a wintry mix is occurring today to the north. A fast-moving clipper storm may bring several inches of snow to the north-central Plains, Midwest, eastern Great Lakes, and Northeast regions this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

52°F

11°C

Humidity 51%
Wind Speed NNW 13 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 05 Dec 07:20 AM PST
Extended Forecast for

4 Miles ESE Walnut Creek CA

Dense Fog Advisory until December 5, 11:00am
Cold Weather Advisory December 5, 07:40am until December 5, 08:00am
Click here for hazard details and duration
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  •  
    Dense Fog Advisory until December 5, 11:00am
    Cold Weather Advisory December 5, 07:40am until December 5, 08:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Today

    High: 62 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 40. Light and variable wind.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 63. North northwest wind 6 to 8 mph.

    High: 63 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 42. East northeast wind 7 to 13 mph.

    Low: 42 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 65. Northeast wind 6 to 8 mph becoming north northwest in the afternoon.

    High: 65 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 42 °F

    Partly Cloudy

  • Monday

    Monday: Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 64.

    High: 64 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 62. North wind 6 to 10 mph.
Tonight
Mostly clear, with a low around 40. Light and variable wind.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 63. North northwest wind 6 to 8 mph.
Saturday Night
Mostly clear, with a low around 42. East northeast wind 7 to 13 mph.
Sunday
Mostly sunny, with a high near 65. Northeast wind 6 to 8 mph becoming north northwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 42.
Monday
Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 65.
Tuesday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 44.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 66.
Wednesday Night
Patchy fog. Otherwise, mostly clear, with a low around 45.
Thursday
Patchy fog. Otherwise, mostly sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Walnut Creek CA
 37.89°N 121.98°W (Elev. 509 ft)
Last Update:
1:40 am PST Dec 5, 2025
Forecast Valid:
7am PST Dec 5, 2025-6pm PST Dec 11, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation