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.

Partly Cloudy

77°F

25°C

Humidity 65%
Wind Speed SW 12 mph
Barometer 29.88 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 13 Oct 4:45 pm EDT
Extended Forecast for

Mountainside NJ

  • Tonight

    Tonight: Clear, with a low around 64. Southwest wind around 9 mph, with gusts as high as 21 mph.

    Low: 64 °F

    Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 82. West wind 7 to 9 mph, with gusts as high as 22 mph.

    High: 82 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55. North wind 6 to 8 mph.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 66. North wind 3 to 6 mph.

    High: 66 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers, mainly after 2am. Low around 54. Southeast wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Slight Chance
    Showers then
    Showers

  • Friday

    Friday: Showers. High near 73. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 73 °F

    Showers

  • Friday Night

    Friday Night: Showers before 8pm. Low around 43. Breezy. Chance of precipitation is 80%.

    Low: 43 °F

    Showers and
    Breezy then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 51. Breezy.

    High: 51 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 64. Southwest wind around 9 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 82. West wind 7 to 9 mph, with gusts as high as 22 mph.
Wednesday Night
Partly cloudy, with a low around 55. North wind 6 to 8 mph.
Thursday
Sunny, with a high near 66. North wind 3 to 6 mph.
Thursday Night
Showers, mainly after 2am. Low around 54. Southeast wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Showers. High near 73. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers before 8pm. Low around 43. Breezy. Chance of precipitation is 80%.
Saturday
Sunny, with a high near 51. Breezy.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 66.
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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:
2:19 pm EDT Oct 13, 2026
Forecast Valid:
5pm EDT Oct 13, 2026-6pm EDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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