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.

Light Rain

63°F

17°C

Humidity 100%
Wind Speed Calm
Barometer 29.61 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 12 Mar 12:35 am EDT
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 51. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Showers
    Likely

  • Thursday

    Thursday: Rain showers likely before 5pm, then a slight chance of rain and snow showers. Cloudy, with a temperature falling to around 41 by 4pm. Northwest wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 55 °F⇓

    Showers
    Likely then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30. West wind 5 to 11 mph.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 49. Light southwest wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 26 mph.

    High: 49 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. South wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 34.

    Low: 34 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy, with a high near 51.

    High: 51 °F

    Cloudy

  • Sunday Night

    Sunday Night: Showers, mainly after 2am. Low around 43. Chance of precipitation is 90%.

    Low: 43 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 51. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain showers likely before 5pm, then a slight chance of rain and snow showers. Cloudy, with a temperature falling to around 41 by 4pm. Northwest wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday Night
Mostly clear, with a low around 30. West wind 5 to 11 mph.
Friday
Increasing clouds, with a high near 49. Light southwest wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 26 mph.
Friday Night
Partly cloudy, with a low around 38. South wind 10 to 14 mph, with gusts as high as 24 mph.
Saturday
Sunny, with a high near 52.
Saturday Night
Increasing clouds, with a low around 34.
Sunday
Cloudy, with a high near 51.
Sunday Night
Showers, mainly after 2am. Low around 43. Chance of precipitation is 90%.
Monday
Showers. High near 63. Chance of precipitation is 90%.
Monday Night
Rain and snow showers likely. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
Tuesday
A 30 percent chance of snow showers. Mostly sunny, with a high near 38.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.66°N 74.35°W (Elev. 141 ft)
Last Update:
7:41 pm EDT Mar 11, 2026
Forecast Valid:
12am EDT Mar 12, 2026-6pm EDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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