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

50°F

10°C

Humidity 88%
Wind Speed N 5 mph
Barometer 29.97 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 11 Mar 2:35 am EDT
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: Clear, with a low around 48. Calm wind.

    Low: 48 °F

    Clear

  • Wednesday

    Wednesday: A slight chance of rain between 9am and 11am, then a chance of showers after 11am. Increasing clouds, with a high near 73. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

    High: 73 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of rain before 11pm, then a chance of rain and thunderstorms between 11pm and 2am, then a chance of rain after 2am. Mostly cloudy, with a low around 52. South wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    Low: 52 °F

    Chance Rain

  • Thursday

    Thursday: Rain likely before 5pm, then a chance of rain and snow. Mostly cloudy, with a temperature falling to around 45 by 2pm. Northwest wind 14 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 57 °F⇓

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of snow before 8pm. Mostly cloudy, then gradually becoming clear, with a low around 31. Northwest wind 6 to 11 mph.

    Low: 31 °F

    Chance Snow
    then Mostly
    Clear

  • Friday

    Friday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 48. Calm wind.
Wednesday
A slight chance of rain between 9am and 11am, then a chance of showers after 11am. Increasing clouds, with a high near 73. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of rain before 11pm, then a chance of rain and thunderstorms between 11pm and 2am, then a chance of rain after 2am. Mostly cloudy, with a low around 52. South wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Thursday
Rain likely before 5pm, then a chance of rain and snow. Mostly cloudy, with a temperature falling to around 45 by 2pm. Northwest wind 14 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday Night
A 30 percent chance of snow before 8pm. Mostly cloudy, then gradually becoming clear, with a low around 31. Northwest wind 6 to 11 mph.
Friday
Partly sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 37.
Saturday
Sunny, with a high near 50.
Saturday Night
Mostly cloudy, with a low around 36.
Sunday
Cloudy, with a high near 56.
Sunday Night
Rain. Low around 48. Chance of precipitation is 80%.
Monday
Rain. High near 59. Chance of precipitation is 80%.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 36.
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:
9:48 pm EDT Mar 10, 2026
Forecast Valid:
2am EDT Mar 11, 2026-6pm EDT Mar 17, 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