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 57. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 57 °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 70. Southwest wind 7 to 11 mph, with gusts as high as 23 mph.

    High: 70 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Rain, mainly after 2am. Low around 50. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Chance Rain
    then Rain

  • Friday

    Friday: Rain, mainly before 8am. Temperature falling to around 51 by 5pm. North wind 11 to 14 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °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 46.

    High: 46 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 57. 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 70. Southwest wind 7 to 11 mph, with gusts as high as 23 mph.
Thursday Night
Rain, mainly after 2am. Low around 50. Southwest wind around 10 mph, with gusts as high as 20 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 51 by 5pm. North wind 11 to 14 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 46.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Mostly sunny, with a high near 53.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Partly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 47.
Tuesday
Partly sunny, with a high near 63.
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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:
2:27 am EDT Mar 25, 2026
Forecast Valid:
7am 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