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

Late January Extreme Cold; Watching East Coast Storm Threat This Weekend

The next blast of Arctic air surges south down the Plains, across the Great Lakes and through the Southeast and East Friday through Saturday. This could be longest duration of cold in several decades. Forecast models are being closely monitored for potential of another significant winter storm to impact the eastern United States this coming weekend. Confidence in coastal impacts has increased. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

44°F

7°C

Humidity 74%
Wind Speed NE 4 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Wind Chill42°F (6°C)
Last update 28 Jan 08:35 AM PST
Extended Forecast for

3 Miles ESE Danville CA

  • Today

    Today: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 61. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 61 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Patchy dense fog. Otherwise, partly cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Patchy Dense
    Fog

  • Thursday

    Thursday: Areas of fog before 9am. Otherwise, sunny, with a high near 63. Light east northeast wind.

    High: 63 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly 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: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 63.

    High: 63 °F

    Mostly Cloudy

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 61. Calm wind becoming north northwest around 6 mph in the afternoon.
Tonight
Patchy dense fog. Otherwise, partly cloudy, with a low around 40. Calm wind.
Thursday
Areas of fog before 9am. Otherwise, sunny, with a high near 63. Light east northeast wind.
Thursday Night
Mostly cloudy, with a low around 40. Calm wind.
Friday
Partly sunny, with a high near 64. Calm wind becoming northeast around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 42.
Saturday
Partly sunny, with a high near 65.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
Mostly cloudy, with a high near 63.
Sunday Night
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 44.
Monday
Patchy fog. Otherwise, mostly sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 65.
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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:
4:54 am PST Jan 28, 2026
Forecast Valid:
8am PST Jan 28, 2026-6pm PST Feb 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation