Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

64°F

18°C

Humidity 10%
Wind Speed ESE 3 MPH
Barometer NA
Dewpoint 8°F (-13°C)
Visibility NA
Last update 30 Jan 11:05 AM PST
Extended Forecast for

3 Miles ESE Danville CA

  • Today

    Today: Mostly sunny, with a high near 65. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 65 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog between 4am and 5am.  Otherwise, mostly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy dense fog between 7am and 8am.  Otherwise, partly sunny, with a high near 66. Light and variable wind.

    High: 66 °F

    Patchy Dense
    Fog then
    Partly Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 42. Northeast wind 5 to 8 mph becoming calm  in the evening.

    Low: 42 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am.  Otherwise, partly sunny, with a high near 65. Calm wind becoming northwest 5 to 8 mph in the afternoon.

    High: 65 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Areas of fog after 4am.  Otherwise, partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy
    then Areas
    Fog

  • Monday

    Monday: Areas of fog before 7am.  Otherwise, sunny, with a high near 65.

    High: 65 °F

    Areas Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 65. Calm wind becoming north northeast around 5 mph in the afternoon.
Tonight
Patchy fog between 4am and 5am. Otherwise, mostly cloudy, with a low around 42. Calm wind.
Saturday
Patchy dense fog between 7am and 8am. Otherwise, partly sunny, with a high near 66. Light and variable wind.
Saturday Night
Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 42. Northeast wind 5 to 8 mph becoming calm in the evening.
Sunday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 65. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Sunday Night
Areas of fog after 4am. Otherwise, partly cloudy, with a low around 43.
Monday
Areas of fog before 7am. Otherwise, sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Mostly sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Danville CA
 37.8°N 121.96°W (Elev. 604 ft)
10:55 am PST Jan 30, 2026
11am PST Jan 30, 2026-6pm PST Feb 5, 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