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.

Partly Cloudy

28°F

-2°C

Humidity 100%
Wind Speed Calm
Barometer 30.18 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 20 Nov 8:55 pm EST
Extended Forecast for

Mountainside NJ

  • Tonight

    Tonight: Areas of frost before 1am. Otherwise, increasing clouds, with a low around 36. Calm wind.

    Low: 36 °F

    Areas Frost

  • Friday

    Friday: Mostly cloudy, with a high near 52. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 52 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Rain likely, mainly after 1am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 41. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Rain Likely
    and Patchy
    Fog

  • Saturday

    Saturday: A 30 percent chance of rain before 1pm. Cloudy through mid morning, then gradual clearing, with a high near 50. North wind 6 to 8 mph.

    High: 50 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29. Northwest wind around 6 mph.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Areas of frost before 1am. Otherwise, increasing clouds, with a low around 36. Calm wind.
Friday
Mostly cloudy, with a high near 52. Calm wind becoming southwest 5 to 7 mph in the morning.
Friday Night
Rain likely, mainly after 1am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 41. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 30 percent chance of rain before 1pm. Cloudy through mid morning, then gradual clearing, with a high near 50. North wind 6 to 8 mph.
Saturday Night
Mostly clear, with a low around 29. Northwest wind around 6 mph.
Sunday
Mostly sunny, with a high near 48.
Sunday Night
Mostly clear, with a low around 35.
Monday
Sunny, with a high near 53.
Monday Night
Mostly cloudy, with a low around 37.
Tuesday
A 40 percent chance of rain after 1pm. Cloudy, with a high near 53.
Tuesday Night
Rain. Low around 48. Chance of precipitation is 80%.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 61.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 40.
Thanksgiving Day
Mostly sunny, with a high near 49.
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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:
12:38 pm EST Nov 20, 2025
Forecast Valid:
9pm EST Nov 20, 2025-6pm EST Nov 27, 2025
 
Forecast Discussion
 
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Additional Resources

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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