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

28°C

82°F

Humidity 55%
Wind Speed SW 20 G 33 km/h
Barometer 29.89 in
Dewpoint 18°C (64°F)
Visibility 16 km
Heat Index29°C (84°F)
Last update 15 Apr 12:45 pm EDT
Extended Forecast for

Mountainside NJ

  • This Afternoon

    This Afternoon: A 20 percent chance of showers after 2pm. Mostly sunny, with a high near 31. Southwest wind 14 to 18 km/h, with gusts as high as 34 km/h.

    High: 31 °C

    Slight Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 19. Southwest wind 8 to 11 km/h becoming northwest after midnight. Chance of precipitation is 30%.

    Low: 19 °C

    Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 31. Southwest wind 8 to 16 km/h.

    High: 31 °C

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 19. Southwest wind 8 to 10 km/h.

    Low: 19 °C

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of showers, mainly after 2pm. Partly sunny, with a high near 27. West wind 10 to 14 km/h.

    High: 27 °C

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 14.

    Low: 14 °C

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 21.

    High: 21 °C

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 11.

    Low: 11 °C

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 18. Chance of precipitation is 60%.

    High: 18 °C

    Showers
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers after 2pm. Mostly sunny, with a high near 31. Southwest wind 14 to 18 km/h, with gusts as high as 34 km/h.
Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 19. Southwest wind 8 to 11 km/h becoming northwest after midnight. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 31. Southwest wind 8 to 16 km/h.
Thursday Night
Mostly cloudy, with a low around 19. Southwest wind 8 to 10 km/h.
Friday
A 40 percent chance of showers, mainly after 2pm. Partly sunny, with a high near 27. West wind 10 to 14 km/h.
Friday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 14.
Saturday
Partly sunny, with a high near 21.
Saturday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 11.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 18. Chance of precipitation is 60%.
Sunday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 4. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 11.
Monday Night
Mostly clear, with a low around 1.
Tuesday
Sunny, with a high near 16.
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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 m)
Last Update:
5:23 am EDT Apr 15, 2026
Forecast Valid:
12pm EDT Apr 15, 2026-6pm EDT Apr 21, 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