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

Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains Thursday night, crossing the Midwest and reaching the Gulf Coast Friday night. Confidence continues to increase for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

49°F

9°C

Humidity 33%
Wind Speed NNW 6 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Wind Chill46°F (8°C)
Last update 28 Jan 07:40 PM PST
Extended Forecast for

3 Miles ESE Danville CA

  • Tonight

    Tonight: Patchy fog after 9pm. Otherwise, mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 63. Light north wind.

    High: 63 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 64. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 64 °F

    Partly Sunny

  • Friday Night

    Friday Night: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, partly sunny, with a high near 65.

    High: 65 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 43.

    Low: 43 °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 3am. Otherwise, mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy
    then Patchy
    Fog

Detailed Forecast

Tonight
Patchy fog after 9pm. Otherwise, mostly clear, with a low around 40. Calm wind.
Thursday
Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 63. Light north wind.
Thursday Night
Partly cloudy, with a low around 41. Calm wind.
Friday
Partly sunny, with a high near 64. Calm wind becoming northeast around 5 mph in the afternoon.
Friday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 41. Calm wind.
Saturday
Patchy fog before 7am. Otherwise, partly sunny, with a high near 65.
Saturday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 43.
Sunday
Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 64.
Sunday Night
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 44.
Monday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 64.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Danville CA
 37.8°N 121.96°W (Elev. 604 ft)
Last Update:
7:43 pm PST Jan 28, 2026
Forecast Valid:
7pm PST Jan 28, 2026-6pm PST Feb 4, 2026
 
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