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

Hazardous Weather Conditions

Current conditions at

Morristown Airport (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Overcast

30°F

-1°C

Humidity 100%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 28 Dec 7:50 pm EST
Extended Forecast for

Mountainside NJ

Winter Weather Advisory December 28, 08:18pm until December 28, 11:00pm
Click here for hazard details and duration
...
  •  
    Winter Weather Advisory December 28, 08:18pm until December 28, 11:00pm

    NOW until 11:00pm Sun

    Winter Weather Advisory

  • Tonight

    Low: 31 °F⇑

    Rain/Freezing
    Rain Likely
    then Rain
    Likely

  • Monday

    Monday: Rain, mainly before 1pm. High near 50. Breezy, with a south wind 7 to 12 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 50 °F

    Rain and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 25. Wind chill values between 15 and 25. West wind 16 to 18 mph, with gusts as high as 39 mph.

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 31. Wind chill values between 10 and 20. West wind around 17 mph, with gusts as high as 34 mph.

    High: 31 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 24. West wind 10 to 15 mph.

    Low: 24 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

Detailed Forecast

Tonight
Rain or freezing rain likely, becoming all rain after 11pm. Cloudy, with a temperature rising to around 38 by 5am. South wind 3 to 7 mph. Chance of precipitation is 60%. Little or no ice accumulation expected.
Monday
Rain, mainly before 1pm. High near 50. Breezy, with a south wind 7 to 12 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Partly cloudy, with a low around 25. Wind chill values between 15 and 25. West wind 16 to 18 mph, with gusts as high as 39 mph.
Tuesday
Mostly cloudy, with a high near 31. Wind chill values between 10 and 20. West wind around 17 mph, with gusts as high as 34 mph.
Tuesday Night
Mostly cloudy, with a low around 24. West wind 10 to 15 mph.
Wednesday
Partly sunny, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 20.
New Year's Day
Partly sunny, with a high near 28.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Mostly sunny, with a high near 29.
Friday Night
Partly cloudy, with a low around 19.
Saturday
Partly sunny, with a high near 34.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
Partly sunny, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.69°N 74.37°W (Elev. 417 ft)
Last Update:
7:07 pm EST Dec 28, 2025
Forecast Valid:
8pm EST Dec 28, 2025-6pm EST Jan 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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