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.

Mostly Cloudy

39°F

4°C

Humidity 52%
Wind Speed E 12 mph
Barometer 30.48 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 15 Mar 10:45 am EDT
Extended Forecast for

Mountainside NJ

  • Today

    Today: Partly sunny, with a high near 48. Southeast wind 7 to 14 mph, with gusts as high as 24 mph.

    High: 48 °F

    Partly Sunny

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly after 2am. Patchy fog after 2am. Temperature falling to near 41 by 8pm, then rising to around 50 during the remainder of the night. Southeast wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 41 °F⇑

    Chance
    Showers then
    Showers and
    Patchy Fog

  • Monday

    Monday: Intermittent showers and thunderstorms. Patchy fog before noon. Otherwise, cloudy, with a high near 64. Breezy, with a south wind 14 to 21 mph, with gusts as high as 39 mph. Chance of precipitation is 50%.

    High: 64 °F

    Intermittent
    T-storms and
    Patchy Fog

  • Monday Night

    Monday Night: Periods of rain showers before 5am, then a chance of rain and snow showers. The rain could be heavy at times. Some thunder is also possible. Low around 31. Breezy, with a south wind 21 to 25 mph becoming west after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 31 °F

    Breezy. Heavy
    Rain then
    Rain/Snow

  • Tuesday

    Tuesday: A 30 percent chance of snow showers before 8am. Mostly sunny, with a high near 40. West wind around 17 mph, with gusts as high as 31 mph.

    High: 40 °F

    Chance Snow
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 39.

    High: 39 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 48. Southeast wind 7 to 14 mph, with gusts as high as 24 mph.
Tonight
Showers and possibly a thunderstorm, mainly after 2am. Patchy fog after 2am. Temperature falling to near 41 by 8pm, then rising to around 50 during the remainder of the night. Southeast wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Intermittent showers and thunderstorms. Patchy fog before noon. Otherwise, cloudy, with a high near 64. Breezy, with a south wind 14 to 21 mph, with gusts as high as 39 mph. Chance of precipitation is 50%.
Monday Night
Periods of rain showers before 5am, then a chance of rain and snow showers. The rain could be heavy at times. Some thunder is also possible. Low around 31. Breezy, with a south wind 21 to 25 mph becoming west after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday
A 30 percent chance of snow showers before 8am. Mostly sunny, with a high near 40. West wind around 17 mph, with gusts as high as 31 mph.
Tuesday Night
Mostly clear, with a low around 24.
Wednesday
Increasing clouds, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Partly sunny, with a high near 48.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
Mostly sunny, with a high near 53.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 37.
Saturday
A 40 percent chance of rain. Partly sunny, with a high near 51.
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:
6:56 am EDT Mar 15, 2026
Forecast Valid:
10am EDT Mar 15, 2026-6pm EDT Mar 21, 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