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.

Overcast

41°F

5°C

Humidity 81%
Wind Speed S 3 mph
Barometer 29.34 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 15 Jan 4:15 am EST
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: A 30 percent chance of showers. Cloudy, with a steady temperature around 40. Calm wind.

    Low: 40 °F

    Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 32 by 5pm. Wind chill values between 20 and 30. West wind 8 to 16 mph, with gusts as high as 29 mph.

    High: 41 °F⇓

    Chance
    Showers then
    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 21. Wind chill values between 10 and 20. West wind 13 to 15 mph, with gusts as high as 28 mph.

    Low: 21 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 34. Wind chill values between 10 and 20. West wind 9 to 15 mph, with gusts as high as 28 mph.

    High: 34 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 28. South wind around 6 mph.

    Low: 28 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and snow after 4pm. Mostly cloudy, with a high near 42. Chance of precipitation is 50%.

    High: 42 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before 7pm. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Chance Snow
    then Mostly
    Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow. Mostly cloudy, with a high near 35.

    High: 35 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers. Cloudy, with a steady temperature around 40. Calm wind.
Thursday
A 30 percent chance of showers, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 32 by 5pm. Wind chill values between 20 and 30. West wind 8 to 16 mph, with gusts as high as 29 mph.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 21. Wind chill values between 10 and 20. West wind 13 to 15 mph, with gusts as high as 28 mph.
Friday
Sunny, with a high near 34. Wind chill values between 10 and 20. West wind 9 to 15 mph, with gusts as high as 28 mph.
Friday Night
Mostly cloudy, with a low around 28. South wind around 6 mph.
Saturday
A chance of snow before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and snow after 4pm. Mostly cloudy, with a high near 42. Chance of precipitation is 50%.
Saturday Night
A 30 percent chance of snow before 7pm. Mostly cloudy, with a low around 28.
Sunday
A 30 percent chance of snow. Mostly cloudy, with a high near 35.
Sunday Night
Partly cloudy, with a low around 20.
M.L.King Day
Sunny, with a high near 30.
Monday Night
Partly cloudy, with a low around 14.
Tuesday
Mostly sunny, with a high near 23.
Tuesday Night
Mostly clear, with a low around 11.
Wednesday
Mostly sunny, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.66°N 74.35°W (Elev. 141 ft)
Last Update:
2:03 am EST Jan 15, 2026
Forecast Valid:
4am EST Jan 15, 2026-6pm EST Jan 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation