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

Morristown Airport (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Fair

30°F

-1°C

Humidity 55%
Wind Speed W 5 mph
Barometer 30.09 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 12 Jan 3:35 am EST
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: Mostly clear, with a low around 30. Wind chill values between 25 and 30. West wind 11 to 13 mph, with gusts as high as 26 mph.

    Low: 30 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 42. Wind chill values between 20 and 30. West wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 42 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 30. Southwest wind around 7 mph.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46. Southwest wind 5 to 8 mph.

    High: 46 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37. South wind around 7 mph.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers. Mostly cloudy, with a high near 49.

    High: 49 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of rain before 1pm, then a chance of rain and snow. Mostly cloudy, with a high near 43. Chance of precipitation is 50%.

    High: 43 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 30. Wind chill values between 25 and 30. West wind 11 to 13 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 42. Wind chill values between 20 and 30. West wind 8 to 11 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 30. Southwest wind around 7 mph.
Tuesday
Mostly sunny, with a high near 46. Southwest wind 5 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 37. South wind around 7 mph.
Wednesday
A 30 percent chance of showers. Mostly cloudy, with a high near 49.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 36.
Thursday
A chance of rain before 1pm, then a chance of rain and snow. Mostly cloudy, with a high near 43. Chance of precipitation is 50%.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 23.
Friday
Mostly sunny, with a high near 33.
Friday Night
Partly cloudy, with a low around 22.
Saturday
Mostly sunny, with a high near 39.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
A 30 percent chance of snow showers. Partly sunny, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.66°N 74.35°W (Elev. 141 ft)
Last Update:
1:57 am EST Jan 12, 2026
Forecast Valid:
3am EST Jan 12, 2026-6pm EST Jan 18, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation