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

19°F

-7°C

Humidity 79%
Wind Speed W 7 mph
Barometer 29.96 in
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 19 Jan 8:45 am EST
Extended Forecast for

Mountainside NJ

  • M.L.King Day

    M.L.King Day: Increasing clouds, with a high near 32. Wind chill values between 15 and 25. Southwest wind 7 to 10 mph, with gusts as high as 23 mph.

    High: 32 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 13. Wind chill values between zero and 10. West wind around 10 mph, with gusts as high as 25 mph.

    Low: 13 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 21. Wind chill values between zero and 10. West wind 9 to 13 mph, with gusts as high as 26 mph.

    High: 21 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 8. West wind around 6 mph becoming calm after midnight.

    Low: 8 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 31. Calm wind becoming south 5 to 8 mph in the morning.

    High: 31 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a steady temperature around 30.

    Low: 30 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

Detailed Forecast

M.L.King Day
Increasing clouds, with a high near 32. Wind chill values between 15 and 25. Southwest wind 7 to 10 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 13. Wind chill values between zero and 10. West wind around 10 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 21. Wind chill values between zero and 10. West wind 9 to 13 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 8. West wind around 6 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 31. Calm wind becoming south 5 to 8 mph in the morning.
Wednesday Night
Mostly cloudy, with a steady temperature around 30.
Thursday
Mostly sunny, with a high near 39.
Thursday Night
Partly cloudy, with a low around 19.
Friday
Partly sunny, with a high near 28.
Friday Night
Mostly cloudy, with a low around 10.
Saturday
Mostly sunny and cold, with a high near 18.
Saturday Night
Mostly cloudy, with a low around 6.
Sunday
A 30 percent chance of snow. Partly sunny and cold, with a high near 19.
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.66°N 74.35°W (Elev. 141 ft)
Last Update:
5:33 am EST Jan 19, 2026
Forecast Valid:
9am EST Jan 19, 2026-6pm EST Jan 25, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation