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

27°F

-3°C

Humidity 100%
Wind Speed Calm
Barometer 30.39 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 25 Mar 6:35 am EDT
Extended Forecast for

Mountainside NJ

  • Today

    Today: Partly sunny, with a high near 55. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 55 °F

    Partly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 43. South wind around 7 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 69. Southwest wind 7 to 13 mph, with gusts as high as 23 mph.

    High: 69 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Rain, mainly after 2am. Low around 49. Southwest wind around 11 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Chance Rain
    then Rain

  • Friday

    Friday: Rain, mainly before 8am. Temperature falling to around 49 by 5pm. North wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F⇓

    Rain then
    Chance Rain

  • Friday Night

    Friday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 44.

    High: 44 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 55. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Tonight
Increasing clouds, with a low around 43. South wind around 7 mph.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 69. Southwest wind 7 to 13 mph, with gusts as high as 23 mph.
Thursday Night
Rain, mainly after 2am. Low around 49. Southwest wind around 11 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain, mainly before 8am. Temperature falling to around 49 by 5pm. North wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Partly cloudy, with a low around 29.
Saturday
Sunny, with a high near 44.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Partly sunny, with a high near 59.
Monday Night
Mostly cloudy, with a low around 46.
Tuesday
Partly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.69°N 74.37°W (Elev. 417 ft)
Last Update:
2:27 am EDT Mar 25, 2026
Forecast Valid:
6am EDT Mar 25, 2026-6pm EDT Mar 31, 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