Prolonged Extreme Cold; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the Gulf Coast, upper Ohio Valley, Mid-Atlantic, and Southeast U.S. into this weekend. A rapidly deepening storm centered just off the North Carolina coast Friday night through Saturday night will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia. 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 15%
Wind Speed NNW 3 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Last update 30 Jan 02:05 AM PST
Extended Forecast for

3 Miles ESE Danville CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65. Calm wind becoming north around 5 mph in the afternoon.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am.  Otherwise, mostly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 7am.  Otherwise, partly sunny, with a high near 66. Northeast wind 3 to 5 mph.

    High: 66 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 3am.  Otherwise, mostly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am.  Otherwise, mostly cloudy, with a high near 64.

    High: 64 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Patchy fog after 11pm.  Otherwise, partly cloudy, with a low around 43.

    Low: 43 °F

    Patchy Fog

  • Monday

    Monday: Areas of fog before 9am.  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

Detailed Forecast

Overnight
Mostly cloudy, with a low around 41. Calm wind.
Friday
Partly sunny, with a high near 65. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 42. Calm wind.
Saturday
Patchy fog before 7am. Otherwise, partly sunny, with a high near 66. Northeast wind 3 to 5 mph.
Saturday Night
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 42. Calm wind.
Sunday
Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 64.
Sunday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 43.
Monday
Areas of fog before 9am. 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 41.
Wednesday
Sunny, with a high near 67.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
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)
1:06 am PST Jan 30, 2026
2am 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