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

Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

Mountain View, Moffett Field (KNUQ)

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

Mostly Cloudy

48°F

9°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 27 Dec 05:55 AM PST
Extended Forecast for

Sunnyvale CA

  • Today

    Today: Mostly sunny, with a high near 53. North northwest wind 3 to 7 mph.

    High: 53 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 37. Light north wind.

    Low: 37 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 54. Calm wind becoming north around 5 mph in the afternoon.

    High: 54 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 5am. Otherwise, mostly clear, with a low around 36. East northeast wind around 6 mph.

    Low: 36 °F

    Clear then
    Patchy Frost

  • Monday

    Monday: Patchy frost before 7am. Otherwise, sunny, with a high near 57. North northeast wind around 5 mph.

    High: 57 °F

    Patchy Frost
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 38.

    Low: 38 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 53. North northwest wind 3 to 7 mph.
Tonight
Increasing clouds, with a low around 37. Light north wind.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 54. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
Patchy frost after 5am. Otherwise, mostly clear, with a low around 36. East northeast wind around 6 mph.
Monday
Patchy frost before 7am. Otherwise, sunny, with a high near 57. North northeast wind around 5 mph.
Monday Night
Clear, with a low around 38.
Tuesday
Sunny, with a high near 59.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Mostly sunny, with a high near 59.
Wednesday Night
A chance of rain after 10pm. Mostly cloudy, with a low around 44.
New Year's Day
A chance of rain. Mostly cloudy, with a high near 56.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 45.
Friday
A chance of rain. Partly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sunnyvale CA
 37.4°N 122.03°W (Elev. 46 ft)
Last Update:
12:27 am PST Dec 27, 2025
Forecast Valid:
6am PST Dec 27, 2025-6pm PST Jan 2, 2026
 
Forecast Discussion
 
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Additional Resources

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