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/Mist

41°F

5°C

Humidity 100%
Wind Speed E 3 mph
Barometer 30.42 in
Dewpoint 41°F (5°C)
Visibility 3.00 mi
Last update 3 Apr 2:15 am EDT
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: A 20 percent chance of showers before 5am. Patchy fog. Otherwise, cloudy, with a low around 40. East wind around 6 mph.

    Low: 40 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Patchy fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 73. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 73 °F

    Patchy Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58. Southwest wind 6 to 8 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 74. Light and variable wind becoming southeast 5 to 8 mph in the afternoon.

    High: 74 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 50. East wind 8 to 11 mph.

    Low: 50 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers. High near 70. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 70 °F

    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers before 5am. Patchy fog. Otherwise, cloudy, with a low around 40. East wind around 6 mph.
Friday
Patchy fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 73. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Partly cloudy, with a low around 58. Southwest wind 6 to 8 mph.
Saturday
A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 74. Light and variable wind becoming southeast 5 to 8 mph in the afternoon.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 50. East wind 8 to 11 mph.
Sunday
Showers. High near 70. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Mostly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Mostly sunny, with a high near 52.
Tuesday Night
Mostly clear, with a low around 30.
Wednesday
Sunny, with a high near 53.
Wednesday Night
Mostly clear, with a low around 36.
Thursday
Sunny, with a high near 64.
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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:
2:20 am EDT Apr 3, 2026
Forecast Valid:
4am EDT Apr 3, 2026-6pm EDT Apr 9, 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