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.

Clear

66°F

19°C

Humidity 35%
Wind Speed SE 12 mph
Barometer 29.79 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 24 Apr 4:45 pm EDT
Extended Forecast for

Mountainside NJ

  • Tonight

    Tonight: A 30 percent chance of rain after 5am. Mostly cloudy, with a low around 46. Southeast wind 6 to 9 mph.

    Low: 46 °F

    Partly Cloudy
    then Chance
    Rain

  • Saturday

    Saturday: Rain, mainly after 8am. High near 49. East wind 11 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 49 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 41. Northeast wind 9 to 11 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.

    Low: 41 °F

    Rain

  • Sunday

    Sunday: A 30 percent chance of rain, mainly before 2pm. Mostly cloudy, with a high near 52. Northeast wind around 10 mph, with gusts as high as 21 mph.

    High: 52 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A 20 percent chance of rain. Partly cloudy, with a low around 41. Northeast wind 6 to 8 mph.

    Low: 41 °F

    Slight Chance
    Rain

  • Monday

    Monday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 30 percent chance of rain after 5am. Mostly cloudy, with a low around 46. Southeast wind 6 to 9 mph.
Saturday
Rain, mainly after 8am. High near 49. East wind 11 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain. Low around 41. Northeast wind 9 to 11 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.
Sunday
A 30 percent chance of rain, mainly before 2pm. Mostly cloudy, with a high near 52. Northeast wind around 10 mph, with gusts as high as 21 mph.
Sunday Night
A 20 percent chance of rain. Partly cloudy, with a low around 41. Northeast wind 6 to 8 mph.
Monday
Sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 48.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 60.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 49.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 64.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 45.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 60.
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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:
3:23 pm EDT Apr 24, 2026
Forecast Valid:
5pm EDT Apr 24, 2026-6pm EDT May 1, 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