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

43°F

6°C

Humidity 61%
Wind Speed Calm
Barometer 30.16 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 12 May 4:55 am EDT
Extended Forecast for

Mountainside NJ

  • Today

    Today: Sunny, with a high near 68. North wind around 6 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 50. South wind 3 to 5 mph.

    Low: 50 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly after 5pm. Mostly cloudy, with a high near 73. South wind 7 to 16 mph, with gusts as high as 29 mph.

    High: 73 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, then showers and possibly a thunderstorm after 11pm. Low around 54. South wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Showers
    Likely then
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 2pm. High near 66. South wind around 7 mph becoming west in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 66 °F

    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before 8am. Partly sunny, with a high near 69.

    High: 69 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 68. North wind around 6 mph.
Tonight
Increasing clouds, with a low around 50. South wind 3 to 5 mph.
Wednesday
A 30 percent chance of showers, mainly after 5pm. Mostly cloudy, with a high near 73. South wind 7 to 16 mph, with gusts as high as 29 mph.
Wednesday Night
Showers likely, then showers and possibly a thunderstorm after 11pm. Low around 54. South wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers, with thunderstorms also possible after 2pm. High near 66. South wind around 7 mph becoming west in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 51.
Friday
A 30 percent chance of showers before 8am. Partly sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.66°N 74.35°W (Elev. 141 ft)
Last Update:
2:35 am EDT May 12, 2026
Forecast Valid:
5am EDT May 12, 2026-6pm EDT May 18, 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