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.

Overcast

52°F

11°C

Humidity 67%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 29 Apr 3:35 am EDT
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: Mostly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers after 5pm. Mostly cloudy, with a high near 64. Calm wind becoming southeast 5 to 9 mph in the afternoon.

    High: 64 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 2am, then showers likely. Low around 47. East wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 47 °F

    Showers

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 63. Northwest wind 7 to 13 mph.

    High: 63 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42. Northwest wind around 11 mph.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 48. Calm wind.
Wednesday
A 30 percent chance of showers after 5pm. Mostly cloudy, with a high near 64. Calm wind becoming southeast 5 to 9 mph in the afternoon.
Wednesday Night
Showers and thunderstorms before 2am, then showers likely. Low around 47. East wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday
A 30 percent chance of showers, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 63. Northwest wind 7 to 13 mph.
Thursday Night
Mostly clear, with a low around 42. Northwest wind around 11 mph.
Friday
Sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 41.
Saturday
Partly sunny, with a high near 57.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
Mostly sunny, with a high near 58.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Mostly sunny, with a high near 64.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 47.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 69.
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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:
2:19 am EDT Apr 29, 2026
Forecast Valid:
3am EDT Apr 29, 2026-6pm EDT May 5, 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