Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

Mountain View, Moffett Field (KNUQ)

Lat: 37.40583°NLon: 122.04806°WElev: 33.0ft.

Clear

50°F

10°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 20 Jan 09:35 PM PST
Extended Forecast for

Sunnyvale CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 63. Calm wind.

    High: 63 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 7am.  Otherwise, mostly cloudy, with a high near 62. Light northwest wind.

    High: 62 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 47. Calm wind.
Wednesday
Cloudy, with a high near 63. Calm wind.
Wednesday Night
Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 47. Calm wind.
Thursday
Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 62. Light northwest wind.
Thursday Night
Mostly cloudy, with a low around 46. Calm wind.
Friday
Mostly sunny, with a high near 62.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 40.
Sunday
Partly sunny, with a high near 63.
Sunday Night
Mostly cloudy, with a low around 43.
Monday
Partly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 64.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Sunnyvale CA
 37.36°N 122.02°W (Elev. 128 ft)
7:24 pm PST Jan 20, 2026
10pm PST Jan 20, 2026-6pm PST Jan 27, 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