National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Morristown Airport (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Overcast

32°F

0°C

Humidity 100%
Wind Speed SW 6 mph
Barometer 30.01 in
Dewpoint 32°F (0°C)
Visibility 0.75 mi
Wind Chill26°F (-3°C)
Last update 17 Jan 1:47 pm EST
Extended Forecast for

Mountainside NJ

Winter Weather Advisory January 18, 07:00am until January 18, 08:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • This Afternoon

    This Afternoon: Snow before 4pm. Steady temperature around 33. Southwest wind around 7 mph. Chance of precipitation is 100%. Total daytime snow accumulation of around an inch possible.

    High: 33 °F

    Snow

  • Tonight

    Tonight: A 40 percent chance of snow, mainly after 4am. Mostly cloudy, with a steady temperature around 32. Light southwest wind.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Periods of snow, mainly after 7am. High near 33. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 33 °F

    Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 21. Northwest wind around 6 mph.

    Low: 21 °F

    Slight Chance
    Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 32. Southwest wind 6 to 13 mph, with gusts as high as 24 mph.

    High: 32 °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 22.

    High: 22 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 11.

    Low: 11 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Snow before 4pm. Steady temperature around 33. Southwest wind around 7 mph. Chance of precipitation is 100%. Total daytime snow accumulation of around an inch possible.
Tonight
A 40 percent chance of snow, mainly after 4am. Mostly cloudy, with a steady temperature around 32. Light southwest wind.
Sunday
Periods of snow, mainly after 7am. High near 33. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
A 20 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 21. Northwest wind around 6 mph.
M.L.King Day
Mostly sunny, with a high near 32. Southwest wind 6 to 13 mph, with gusts as high as 24 mph.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Sunny, with a high near 22.
Tuesday Night
Mostly clear, with a low around 11.
Wednesday
Mostly sunny, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Partly sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 18.
Friday
Mostly sunny, with a high near 30.
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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:
1:04 pm EST Jan 17, 2026
Forecast Valid:
2pm 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