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.

Fair

45°F

7°C

Humidity 93%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 11 Mar 4:35 am EDT
Extended Forecast for

Mountainside NJ

  • Today

    Today: A 40 percent chance of showers, mainly after 2pm. Mostly sunny, with a high near 83. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 21 mph.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. South wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    Low: 45 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly before 11am. Mostly cloudy, with a temperature falling to around 44 by 3pm. Northwest wind 14 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F⇓

    Showers
    Likely

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 30. West wind 5 to 10 mph.

    Low: 30 °F

    Decreasing
    Clouds

  • Friday

    Friday: Increasing clouds, with a high near 50. Light southwest wind becoming south 11 to 16 mph in the morning. Winds could gust as high as 29 mph.

    High: 50 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, with a high near 52.

    High: 52 °F

    Cloudy

Detailed Forecast

Today
A 40 percent chance of showers, mainly after 2pm. Mostly sunny, with a high near 83. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. South wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Thursday
Showers likely, mainly before 11am. Mostly cloudy, with a temperature falling to around 44 by 3pm. Northwest wind 14 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 30. West wind 5 to 10 mph.
Friday
Increasing clouds, with a high near 50. Light southwest wind becoming south 11 to 16 mph in the morning. Winds could gust as high as 29 mph.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Sunny, with a high near 51.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
Cloudy, with a high near 52.
Sunday Night
Rain, mainly after 2am. Low around 44. Chance of precipitation is 90%.
Monday
Rain. High near 62. Chance of precipitation is 90%.
Monday Night
Rain likely. Mostly cloudy, with a low around 29. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.66°N 74.35°W (Elev. 141 ft)
Last Update:
3:05 am EDT Mar 11, 2026
Forecast Valid:
4am EDT Mar 11, 2026-6pm EDT Mar 17, 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