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

77°F

25°C

Humidity 74%
Wind Speed W 8 mph
Barometer 30.04 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 1 Oct 2:45 pm EDT
Extended Forecast for

Mountainside NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Southwest wind 3 to 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 84. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 30%.

    High: 84 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms before 11pm. Cloudy during the early evening, then gradual clearing, with a low around 58. North wind 7 to 9 mph.

    Low: 58 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 69. North wind 6 to 8 mph.

    High: 69 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54. Light northeast wind.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 64.

    High: 64 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 64. Southwest wind 3 to 5 mph.
Friday
A slight chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 84. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 30%.
Friday Night
A 40 percent chance of showers and thunderstorms before 11pm. Cloudy during the early evening, then gradual clearing, with a low around 58. North wind 7 to 9 mph.
Saturday
Mostly sunny, with a high near 69. North wind 6 to 8 mph.
Saturday Night
Mostly clear, with a low around 54. Light northeast wind.
Sunday
A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 64.
Sunday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 60.
Tuesday Night
Clear, with a low around 42.
Wednesday
Sunny, with a high near 61.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 67.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.69°N 74.37°W (Elev. 417 ft)
Last Update:
2:44 pm EDT Oct 1, 2026
Forecast Valid:
3pm EDT Oct 1, 2026-6pm EDT Oct 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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