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.

Shallow Fog

54°F

12°C

Humidity 100%
Wind Speed Calm
Barometer 30.17 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 4 Apr 7:45 am EDT
Extended Forecast for

Mountainside NJ

  • Today

    Today: Increasing clouds, with a high near 69. North wind 5 to 10 mph becoming southeast in the afternoon.

    High: 69 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A chance of rain and thunderstorms. Cloudy, with a low around 45. East wind 8 to 14 mph. Chance of precipitation is 40%.

    Low: 45 °F

    Chance Rain

  • Sunday

    Sunday: Rain, mainly before 5pm. High near 66. West wind 7 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 66 °F

    Rain

  • Sunday Night

    Sunday Night: A 30 percent chance of rain before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Chance Rain
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 56. West wind 10 to 13 mph.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 29.

    Low: 29 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 69. North wind 5 to 10 mph becoming southeast in the afternoon.
Tonight
A chance of rain and thunderstorms. Cloudy, with a low around 45. East wind 8 to 14 mph. Chance of precipitation is 40%.
Sunday
Rain, mainly before 5pm. High near 66. West wind 7 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A 30 percent chance of rain before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Northwest wind around 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 56. West wind 10 to 13 mph.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Mostly sunny, with a high near 51.
Tuesday Night
Clear, with a low around 29.
Wednesday
Sunny, with a high near 50.
Wednesday Night
Mostly clear, with a low around 35.
Thursday
Sunny, with a high near 62.
Thursday Night
Mostly clear, with a low around 43.
Friday
Sunny, with a high near 68.
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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:
2:33 am EDT Apr 4, 2026
Forecast Valid:
8am EDT Apr 4, 2026-6pm EDT Apr 10, 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