Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

56°F

13°C

Humidity 26%
Wind Speed S 3 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Last update 21 Jan 12:50 AM PST
Extended Forecast for

7 Miles ENE Danville CA

  • Overnight

    Overnight: Cloudy, with a low around 47. South wind around 5 mph becoming east northeast.

    Low: 47 °F

    Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 57. Northeast wind around 5 mph becoming light and variable.

    High: 57 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 47. Southwest wind around 6 mph.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 57. West wind around 6 mph.

    High: 57 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 45. Southwest wind around 8 mph.

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly 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 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 47. South wind around 5 mph becoming east northeast.
Wednesday
Cloudy, with a high near 57. Northeast wind around 5 mph becoming light and variable.
Wednesday Night
Mostly cloudy, with a low around 47. Southwest wind around 6 mph.
Thursday
Partly sunny, with a high near 57. West wind around 6 mph.
Thursday Night
Mostly cloudy, with a low around 45. Southwest wind around 8 mph.
Friday
Mostly sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 42.
Saturday
Sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
Partly sunny, with a high near 54.
Sunday Night
Mostly cloudy, with a low around 43.
Monday
Partly sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Partly sunny, with a high near 56.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles ENE Danville CA
 37.83°N 121.88°W (Elev. 1913 ft)
12:26 am PST Jan 21, 2026
1am PST Jan 21, 2026-6pm PST Jan 27, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database