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.

Overcast

50°F

10°C

Humidity 100%
Wind Speed Calm
Barometer 29.75 in
Dewpoint 50°F (10°C)
Visibility 7.00 mi
Last update 21 Mar 1:15 am EDT
Extended Forecast for

Summit NJ

  • Overnight

    Overnight: A 40 percent chance of showers, mainly before 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a steady temperature around 50. West wind 3 to 5 mph.

    Low: 50 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Sunny, with a high near 57. North wind 8 to 11 mph.

    High: 57 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 40. Light and variable wind.

    Low: 40 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 66. Southwest wind 5 to 10 mph, with gusts as high as 21 mph.

    High: 66 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly after 8pm. Mostly cloudy, with a low around 43. Southwest wind around 8 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Rain Likely

  • Monday

    Monday: A 30 percent chance of rain before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 52.

    High: 52 °F

    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 40 percent chance of showers, mainly before 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a steady temperature around 50. West wind 3 to 5 mph.
Saturday
Sunny, with a high near 57. North wind 8 to 11 mph.
Saturday Night
Increasing clouds, with a low around 40. Light and variable wind.
Sunday
A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 66. Southwest wind 5 to 10 mph, with gusts as high as 21 mph.
Sunday Night
Rain likely, mainly after 8pm. Mostly cloudy, with a low around 43. Southwest wind around 8 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 30 percent chance of rain before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 30.
Tuesday
Sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 50.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 54.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39.
Friday
A 30 percent chance of rain. Mostly cloudy, with a high near 53.
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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:
8:14 pm EDT Mar 20, 2026
Forecast Valid:
1am EDT Mar 21, 2026-6pm EDT Mar 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