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 57%
Wind Speed SE 14 G 20 mph
Barometer 30.44 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 15 Mar 1:45 pm EDT
Extended Forecast for

Mountainside NJ

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 49. Southeast wind around 14 mph, with gusts as high as 25 mph.

    High: 49 °F

    Partly Sunny

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly after 2am. Temperature falling to near 44 by 9pm, then rising to around 51 during the remainder of the night. East wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 44 °F⇑

    Chance
    Showers then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 65. South wind 10 to 18 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 65 °F

    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 33. South wind 16 to 18 mph becoming west after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 33 °F

    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Mostly sunny, with a high near 41. West wind 15 to 17 mph, with gusts as high as 32 mph.

    High: 41 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 41.

    High: 41 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 49. Southeast wind around 14 mph, with gusts as high as 25 mph.
Tonight
Showers and possibly a thunderstorm, mainly after 2am. Temperature falling to near 44 by 9pm, then rising to around 51 during the remainder of the night. East wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm. High near 65. South wind 10 to 18 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 33. South wind 16 to 18 mph becoming west after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 41. West wind 15 to 17 mph, with gusts as high as 32 mph.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Increasing clouds, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Partly sunny, with a high near 48.
Thursday Night
Mostly cloudy, with a low around 35.
Friday
Mostly sunny, with a high near 55.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 39.
Saturday
A 30 percent chance of rain. Partly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.66°N 74.35°W (Elev. 141 ft)
Last Update:
2:22 pm EDT Mar 15, 2026
Forecast Valid:
2pm EDT Mar 15, 2026-6pm EDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation