National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Morristown Airport (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Overcast

68°F

20°C

Humidity 88%
Wind Speed Calm
Barometer 29.79 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 18 Jun 1:15 am EDT
Extended Forecast for

Summit NJ

  • Overnight

    Overnight: Mostly cloudy, with a low around 64. South wind around 5 mph.

    Low: 64 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 88. South wind 10 to 17 mph becoming southwest in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 50%.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 65. West wind 9 to 13 mph, with gusts as high as 28 mph.

    Low: 65 °F

    Increasing
    Clouds

  • Juneteenth

    Juneteenth: Mostly cloudy, then gradually becoming sunny, with a high near 81. West wind 9 to 14 mph, with gusts as high as 24 mph.

    High: 81 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Clear, with a low around 61. West wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Saturday Night

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

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 64. South wind around 5 mph.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 88. South wind 10 to 17 mph becoming southwest in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 50%.
Thursday Night
Increasing clouds, with a low around 65. West wind 9 to 13 mph, with gusts as high as 28 mph.
Juneteenth
Mostly cloudy, then gradually becoming sunny, with a high near 81. West wind 9 to 14 mph, with gusts as high as 24 mph.
Friday Night
Clear, with a low around 61. West wind 8 to 11 mph, with gusts as high as 22 mph.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Sunny, with a high near 82.
Sunday Night
A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 62.
Monday
Showers, mainly after 8am. High near 81. Chance of precipitation is 80%.
Monday Night
Showers. Low around 62. Chance of precipitation is 80%.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Mostly sunny, with a high near 83.
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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:
2:20 pm EDT Jun 17, 2026
Forecast Valid:
1am EDT Jun 18, 2026-6pm EDT Jun 24, 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