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.

A Few Clouds

41°F

5°C

Humidity 26%
Wind Speed NW 9 G 17 mph
Barometer 30.44 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 28 Mar 6:45 pm EDT
Extended Forecast for

Mountainside NJ

  • Tonight

    Tonight: Mostly clear, with a low around 30. Northwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 21 mph.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 55. Light southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 24 mph.

    High: 55 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 42. Southwest wind around 10 mph.

    Low: 42 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 64. Southwest wind 9 to 13 mph, with gusts as high as 24 mph.

    High: 64 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 53. Southwest wind around 7 mph.

    Low: 53 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Partly sunny, with a high near 77.

    High: 77 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of rain after 2pm. Partly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 8pm. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.

    Low: 41 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 30. Northwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 21 mph.
Sunday
Mostly sunny, with a high near 55. Light southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 42. Southwest wind around 10 mph.
Monday
Partly sunny, with a high near 64. Southwest wind 9 to 13 mph, with gusts as high as 24 mph.
Monday Night
A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 53. Southwest wind around 7 mph.
Tuesday
A 30 percent chance of showers before 8am. Partly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
A 50 percent chance of rain after 2pm. Partly sunny, with a high near 75.
Wednesday Night
Rain likely, mainly after 8pm. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 48.
Thursday Night
Rain and snow likely. Mostly cloudy, with a low around 37. Chance of precipitation is 70%.
Friday
Rain and snow likely. Cloudy, with a high near 48. Chance of precipitation is 60%.
Friday Night
Rain likely. Cloudy, with a low around 40. Chance of precipitation is 60%.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 53.
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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:
2:35 pm EDT Mar 28, 2026
Forecast Valid:
7pm EDT Mar 28, 2026-6pm EDT Apr 4, 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