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.

Mostly Cloudy

45°F

7°C

Humidity 43%
Wind Speed S 15 G 21 mph
Barometer 29.87 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 13 Mar 5:45 pm EDT
Extended Forecast for

Mountainside NJ

  • Tonight

    Tonight: A chance of showers between 8pm and 11pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 38. Southwest wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    Low: 38 °F

    Chance
    Showers then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 49. Breezy, with a west wind 18 to 21 mph, with gusts as high as 41 mph.

    High: 49 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 34. Northwest wind 5 to 10 mph becoming light after midnight.

    Low: 34 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 48. Southeast wind 5 to 13 mph.

    High: 48 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain, mainly after 2am. Temperature falling to near 44 by 8pm, then rising to around 49 during the remainder of the night. Southeast wind 9 to 13 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 44 °F⇑

    Slight Chance
    Rain then
    Rain

  • Monday

    Monday: Rain, with thunderstorms also possible after 2pm. High near 64. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 64 °F

    Rain

  • Monday Night

    Monday Night: Rain before 2am, then a chance of rain and snow. Low around 34. Breezy. Chance of precipitation is 90%.

    Low: 34 °F

    Rain and
    Breezy then
    Rain/Snow

  • Tuesday

    Tuesday: A chance of rain and snow before 8am. Partly sunny, with a high near 41. Chance of precipitation is 30%.

    High: 41 °F

    Chance
    Rain/Snow
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers between 8pm and 11pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 38. Southwest wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 49. Breezy, with a west wind 18 to 21 mph, with gusts as high as 41 mph.
Saturday Night
Increasing clouds, with a low around 34. Northwest wind 5 to 10 mph becoming light after midnight.
Sunday
Mostly cloudy, with a high near 48. Southeast wind 5 to 13 mph.
Sunday Night
Rain, mainly after 2am. Temperature falling to near 44 by 8pm, then rising to around 49 during the remainder of the night. Southeast wind 9 to 13 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 2pm. High near 64. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Rain before 2am, then a chance of rain and snow. Low around 34. Breezy. Chance of precipitation is 90%.
Tuesday
A chance of rain and snow before 8am. Partly sunny, with a high near 41. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 24.
Wednesday
Mostly sunny, with a high near 40.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Partly sunny, with a high near 47.
Thursday Night
Partly cloudy, with a low around 35.
Friday
Partly sunny, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.69°N 74.37°W (Elev. 417 ft)
Last Update:
2:26 pm EDT Mar 13, 2026
Forecast Valid:
6pm EDT Mar 13, 2026-6pm EDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation