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

Snow Squalls May Impact the Northeast on Thursday; Dangerously Cold Arctic Air Impact the North-Central US

Snow showers and snow squalls are likely to develop across the Northeast on Thursday. Lake effect snow will persist downwind of the Great Lakes. An arctic blast will bring frigid temperatures, gusty winds and dangerous wind chills to the Northern Plains before expanding to the South and East. A major winter storm will begin impacting the Southern Plains and Lower Mississippi Valley Friday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

55°F

13°C

Humidity 18%
Wind Speed NW 7 MPH
Barometer NA
Dewpoint 13°F (-11°C)
Visibility NA
Last update 22 Jan 12:05 AM PST
Extended Forecast for

3 Miles ESE Danville CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 62. Light west southwest wind.

    High: 62 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 3am. Otherwise, increasing clouds, with a low around 43. Calm wind.

    Low: 43 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 58. Calm wind.

    High: 58 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy frost after 5am. Otherwise, mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Sunday

    Sunday: Patchy frost before 7am. Otherwise, partly sunny, with a high near 58.

    High: 58 °F

    Patchy Frost
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 43. Calm wind.
Thursday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 62. Light west southwest wind.
Thursday Night
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 43. Calm wind.
Friday
Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 58. Calm wind.
Friday Night
Mostly clear, with a low around 39. Calm wind.
Saturday
Sunny, with a high near 60.
Saturday Night
Patchy frost after 5am. Otherwise, mostly clear, with a low around 36.
Sunday
Patchy frost before 7am. Otherwise, partly sunny, with a high near 58.
Sunday Night
Mostly cloudy, with a low around 37.
Monday
Mostly sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Danville CA
 37.8°N 121.96°W (Elev. 604 ft)
Last Update:
2:22 pm PST Jan 21, 2026
Forecast Valid:
12am PST Jan 22, 2026-6pm PST Jan 28, 2026
 
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Additional Resources

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