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

34°F

1°C

Humidity 70%
Wind Speed SW 6 mph
Barometer 30.09 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 13 Jan 8:45 am EST
Extended Forecast for

Mountainside NJ

  • Today

    Today: Increasing clouds, with a high near 45. South wind 7 to 9 mph.

    High: 45 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 20 percent chance of showers after 1am. Mostly cloudy, with a steady temperature around 40. Southwest wind around 8 mph.

    Low: 40 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of rain after 1pm. Cloudy, with a high near 48. Southwest wind around 6 mph.

    High: 48 °F

    Mostly Cloudy
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 4am, then rain likely, possibly mixed with snow. Cloudy, with a low around 29. Calm wind becoming west 5 to 8 mph after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 29 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday

    Thursday: A slight chance of rain and snow before 10am, then a slight chance of snow between 10am and 1pm. Partly sunny, with a temperature falling to around 27 by 5pm. West wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 34 °F⇓

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 45. South wind 7 to 9 mph.
Tonight
A 20 percent chance of showers after 1am. Mostly cloudy, with a steady temperature around 40. Southwest wind around 8 mph.
Wednesday
A 30 percent chance of rain after 1pm. Cloudy, with a high near 48. Southwest wind around 6 mph.
Wednesday Night
Rain likely before 4am, then rain likely, possibly mixed with snow. Cloudy, with a low around 29. Calm wind becoming west 5 to 8 mph after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday
A slight chance of rain and snow before 10am, then a slight chance of snow between 10am and 1pm. Partly sunny, with a temperature falling to around 27 by 5pm. West wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 30.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Partly sunny, with a high near 40.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 20.
M.L.King Day
Mostly sunny, with a high near 30.
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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:
5:50 am EST Jan 13, 2026
Forecast Valid:
9am EST Jan 13, 2026-6pm EST Jan 19, 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