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

32°F

0°C

Humidity 69%
Wind Speed N 6 mph
Barometer 30.25 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 24 Mar 12:35 am EDT
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: Mostly clear, with a low around 30. Northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 49. Wind chill values between 25 and 35 early. North wind 5 to 7 mph becoming light and variable.

    High: 49 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 34. Southwest wind around 6 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 54. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 54 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 43. South wind around 8 mph.

    Low: 43 °F

    Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 67.

    High: 67 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.

    Low: 48 °F

    Chance Rain
    then Rain
    Likely

  • Friday

    Friday: Rain likely, mainly before 8am. Partly sunny, with a high near 56. Chance of precipitation is 60%.

    High: 56 °F

    Rain Likely

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 30. Northwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 49. Wind chill values between 25 and 35 early. North wind 5 to 7 mph becoming light and variable.
Tuesday Night
Increasing clouds, with a low around 34. Southwest wind around 6 mph.
Wednesday
Partly sunny, with a high near 54. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
Cloudy, with a low around 43. South wind around 8 mph.
Thursday
Mostly cloudy, with a high near 67.
Thursday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.
Friday
Rain likely, mainly before 8am. Partly sunny, with a high near 56. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Sunny, with a high near 43.
Saturday Night
Mostly clear, with a low around 29.
Sunday
Sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Mostly sunny, with a high near 57.
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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:
5:10 pm EDT Mar 23, 2026
Forecast Valid:
1am EDT Mar 24, 2026-6pm EDT Mar 30, 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