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

21°F

-6°C

Humidity 93%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 19°F (-7°C)
Visibility 7.00 mi
Last update 6 Dec 11:55 pm EST
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 29. Light northwest wind.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 39. Calm wind becoming south around 5 mph in the afternoon.

    High: 39 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 24. Light and variable wind becoming northwest 5 to 9 mph in the evening.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 29. Wind chill values between 15 and 20. North wind 8 to 11 mph, with gusts as high as 22 mph.

    High: 29 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 14. North wind around 6 mph becoming calm after midnight.

    Low: 14 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 32.

    High: 32 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of rain. Mostly cloudy, with a high near 43.

    High: 43 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 29. Light northwest wind.
Sunday
Partly sunny, with a high near 39. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 24. Light and variable wind becoming northwest 5 to 9 mph in the evening.
Monday
Mostly sunny, with a high near 29. Wind chill values between 15 and 20. North wind 8 to 11 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 14. North wind around 6 mph becoming calm after midnight.
Tuesday
Increasing clouds, with a high near 32.
Tuesday Night
Mostly cloudy, with a low around 28.
Wednesday
A 50 percent chance of rain. Mostly cloudy, with a high near 43.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 32.
Thursday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 42.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Friday
A chance of rain and snow. Partly sunny, with a high near 38. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 21.
Saturday
Mostly sunny, with a high near 31.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.69°N 74.37°W (Elev. 417 ft)
Last Update:
4:40 pm EST Dec 6, 2025
Forecast Valid:
12am EST Dec 7, 2025-6pm EST Dec 13, 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