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

64°F

18°C

Humidity 88%
Wind Speed NE 7 mph
Barometer 30.08 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 21 Aug 7:45 am EDT
Extended Forecast for

Summit NJ

  • Today

    Today: Mostly sunny, with a high near 81. Northeast wind 6 to 8 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers, mainly after 2pm. Mostly cloudy, with a high near 75. Light and variable wind becoming east around 5 mph in the afternoon.

    High: 75 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 63. Light east wind. Chance of precipitation is 50%.

    Low: 63 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 50%.

    High: 81 °F

    Partly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 81. Northeast wind 6 to 8 mph.
Tonight
Mostly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.
Saturday
A 50 percent chance of showers, mainly after 2pm. Mostly cloudy, with a high near 75. Light and variable wind becoming east around 5 mph in the afternoon.
Saturday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 63. Light east wind. Chance of precipitation is 50%.
Sunday
A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 50%.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 61.
Monday
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
Sunny, with a high near 81.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 64.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Summit NJ
 40.71°N 74.37°W (Elev. 400 ft)
Last Update:
3:45 am EDT Aug 21, 2026
Forecast Valid:
7am EDT Aug 21, 2026-6pm EDT Aug 27, 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