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.

Fog

45°F

7°C

Humidity 100%
Wind Speed Calm
Barometer 29.85 in
Dewpoint 45°F (7°C)
Visibility 0.38 mi
Last update 5 Apr 9:45 am EDT
Extended Forecast for

Mountainside NJ

  • Today

    Today: Rain and possibly a thunderstorm. High near 65. West wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 65 °F

    Rain

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 38. West wind around 10 mph.

    Low: 38 °F

    Gradual
    Clearing

  • Monday

    Monday: Sunny, with a high near 56. West wind around 11 mph, with gusts as high as 22 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain. Partly cloudy, with a low around 38. West wind around 6 mph.

    Low: 38 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50. Northwest wind 10 to 15 mph, with gusts as high as 28 mph.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 28 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

Detailed Forecast

Today
Rain and possibly a thunderstorm. High near 65. West wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 38. West wind around 10 mph.
Monday
Sunny, with a high near 56. West wind around 11 mph, with gusts as high as 22 mph.
Monday Night
A 20 percent chance of rain. Partly cloudy, with a low around 38. West wind around 6 mph.
Tuesday
Mostly sunny, with a high near 50. Northwest wind 10 to 15 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 28.
Wednesday
Sunny, with a high near 49.
Wednesday Night
Mostly clear, with a low around 34.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Partly cloudy, with a low around 43.
Friday
Mostly sunny, with a high near 71.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 71.
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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:
5:03 am EDT Apr 5, 2026
Forecast Valid:
10am EDT Apr 5, 2026-6pm EDT Apr 11, 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