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.

Fair

27°F

-3°C

Humidity 100%
Wind Speed Calm
Barometer 29.79 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 14 Mar 3:55 am EDT
Extended Forecast for

Mountainside NJ

  • Today

    Today: Sunny, with a high near 50. Breezy, with a west wind 11 to 16 mph increasing to 19 to 24 mph in the morning. Winds could gust as high as 40 mph.

    High: 50 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 31. Northwest wind 6 to 11 mph becoming light after midnight.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 50. Southeast wind 6 to 13 mph.

    High: 50 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Rain, mainly after 2am. Temperature falling to near 45 by 8pm, then rising to around 50 during the remainder of the night. East wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F⇑

    Chance Rain
    then Rain

  • Monday

    Monday: Rain, with thunderstorms also possible after 11am. Some of the storms could produce heavy rainfall. High near 67. Breezy, with a south wind 16 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 67 °F

    Heavy Rain
    and Breezy

  • Monday Night

    Monday Night: Rain before 5am, then a chance of rain and snow. The rain could be heavy at times. Low around 35. Windy. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 35 °F

    Heavy Rain
    and Windy
    then
    Rain/Snow and
    Breezy

  • Tuesday

    Tuesday: A 30 percent chance of snow before 8am. Mostly cloudy through mid morning, then becoming sunny, with a high near 42.

    High: 42 °F

    Chance Snow
    then Mostly
    Sunny

  • Tuesday Night

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

    Low: 25 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 50. Breezy, with a west wind 11 to 16 mph increasing to 19 to 24 mph in the morning. Winds could gust as high as 40 mph.
Tonight
Partly cloudy, with a low around 31. Northwest wind 6 to 11 mph becoming light after midnight.
Sunday
Partly sunny, with a high near 50. Southeast wind 6 to 13 mph.
Sunday Night
Rain, mainly after 2am. Temperature falling to near 45 by 8pm, then rising to around 50 during the remainder of the night. East wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain, with thunderstorms also possible after 11am. Some of the storms could produce heavy rainfall. High near 67. Breezy, with a south wind 16 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Rain before 5am, then a chance of rain and snow. The rain could be heavy at times. Low around 35. Windy. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday
A 30 percent chance of snow before 8am. Mostly cloudy through mid morning, then becoming sunny, with a high near 42.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Mostly sunny, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Partly sunny, with a high near 49.
Thursday Night
Partly cloudy, with a low around 34.
Friday
Mostly sunny, with a high near 53.
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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:
3:09 am EDT Mar 14, 2026
Forecast Valid:
4am EDT Mar 14, 2026-6pm EDT Mar 20, 2026
 
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