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

72°F

22°C

Humidity 94%
Wind Speed W 7 mph
Barometer 29.96 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 5 Sep 9:45 am EDT
Extended Forecast for

Mountainside NJ

  • Today

    Today: Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.

    High: 85 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. South wind around 7 mph.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. Increasing clouds, with a high near 85. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 85 °F

    Chance
    T-storms then
    Heavy Rain

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 60. Northwest wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Heavy Rain

  • Sunday

    Sunday: A 30 percent chance of showers, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 74. North wind around 6 mph becoming west in the afternoon.

    High: 74 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 66. South wind around 7 mph.
Saturday
A chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. Increasing clouds, with a high near 85. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 60. Northwest wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
A 30 percent chance of showers, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 74. North wind around 6 mph becoming west in the afternoon.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 53.
Wednesday
Partly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Mostly 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:
7:06 am EDT Sep 5, 2025
Forecast Valid:
10am EDT Sep 5, 2025-6pm EDT Sep 11, 2025
 
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