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.

Mostly Cloudy

46°F

8°C

Humidity 82%
Wind Speed Calm
Barometer 30.36 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 12 Apr 9:45 pm EDT
Extended Forecast for

Mountainside NJ

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. South wind 6 to 8 mph.

    Low: 49 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers after 2pm. Mostly cloudy, with a high near 78. Southwest wind 9 to 15 mph, with gusts as high as 25 mph.

    High: 78 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58. West wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Southwest wind 5 to 10 mph, with gusts as high as 21 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 61. Southwest wind 5 to 8 mph.

    Low: 61 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 49. South wind 6 to 8 mph.
Monday
A 20 percent chance of showers after 2pm. Mostly cloudy, with a high near 78. Southwest wind 9 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 58. West wind 6 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 83. Southwest wind 5 to 10 mph, with gusts as high as 21 mph.
Tuesday Night
A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 61. Southwest wind 5 to 8 mph.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 65.
Thursday
Partly sunny, with a high near 84.
Thursday Night
Mostly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 58.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 57.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 77.
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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:
7:02 pm EDT Apr 12, 2026
Forecast Valid:
10pm EDT Apr 12, 2026-6pm EDT Apr 19, 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