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.

A Few Clouds

37°F

3°C

Humidity 56%
Wind Speed W 6 mph
Barometer 30.11 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 12 Jan 4:45 pm EST
Extended Forecast for

Mountainside NJ

  • Tonight

    Tonight: Mostly clear, with a low around 30. West wind 6 to 9 mph.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 45. Wind chill values between 25 and 35 early. West wind 6 to 8 mph.

    High: 45 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Southwest wind around 8 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly after 1pm. Cloudy, with a high near 48. Southwest wind around 6 mph.

    High: 48 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Cloudy, with a low around 32. Calm wind becoming west around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 32 °F

    Showers
    Likely

  • Thursday

    Thursday: A 40 percent chance of rain before 1pm. Mostly cloudy, with a temperature falling to around 31 by 5pm.

    High: 39 °F⇓

    Chance Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 30. West wind 6 to 9 mph.
Tuesday
Sunny, with a high near 45. Wind chill values between 25 and 35 early. West wind 6 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 36. Southwest wind around 8 mph.
Wednesday
A 30 percent chance of showers, mainly after 1pm. Cloudy, with a high near 48. Southwest wind around 6 mph.
Wednesday Night
Showers likely, mainly after 1am. Cloudy, with a low around 32. Calm wind becoming west around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 40 percent chance of rain before 1pm. Mostly cloudy, with a temperature falling to around 31 by 5pm.
Thursday Night
Partly cloudy, with a low around 18.
Friday
Mostly sunny, with a high near 31.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 38.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
A 30 percent chance of snow. Partly sunny, with a high near 34.
Sunday Night
Partly cloudy, with a low around 18.
M.L.King Day
Mostly sunny, with a high near 29.
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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:
12:48 pm EST Jan 12, 2026
Forecast Valid:
5pm EST Jan 12, 2026-6pm EST Jan 19, 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