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

27°F

-3°C

Humidity 74%
Wind Speed W 5 mph
Barometer 30.08 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 17 Jan 1:55 am EST
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: A 40 percent chance of snow, mainly after 4am. Mostly cloudy, with a steady temperature around 31. Light south wind.

    Low: 31 °F

    Chance Snow

  • Saturday

    Saturday: Rain and snow, mainly before 4pm. High near 38. Light and variable wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Snow then
    Rain/Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after 4am. Mostly cloudy, with a low around 29. Light west wind.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 50 percent chance of snow, mainly after 7am. Cloudy, with a high near 34. Calm wind becoming west around 6 mph in the afternoon.

    High: 34 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21. West wind around 6 mph.

    Low: 21 °F

    Mostly Cloudy

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 23.

    High: 23 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 12.

    Low: 12 °F

    Mostly Clear

Detailed Forecast

Overnight
A 40 percent chance of snow, mainly after 4am. Mostly cloudy, with a steady temperature around 31. Light south wind.
Saturday
Rain and snow, mainly before 4pm. High near 38. Light and variable wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Saturday Night
A 20 percent chance of snow after 4am. Mostly cloudy, with a low around 29. Light west wind.
Sunday
A 50 percent chance of snow, mainly after 7am. Cloudy, with a high near 34. Calm wind becoming west around 6 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 21. West wind around 6 mph.
M.L.King Day
Mostly sunny, with a high near 33.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Sunny, with a high near 23.
Tuesday Night
Mostly clear, with a low around 12.
Wednesday
Mostly sunny, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Partly sunny, with a high near 39.
Thursday Night
Mostly cloudy, with a low around 22.
Friday
Mostly sunny, with a high near 32.
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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:
12:59 am EST Jan 17, 2026
Forecast Valid:
2am EST Jan 17, 2026-6pm EST Jan 23, 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