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.

Clear

86°F

30°C

Humidity 52%
Wind Speed W 14 G 21 mph
Barometer 30.11 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 30 Jun 11:45 am EDT
Extended Forecast for

Summit NJ

Extreme Heat Watch July 1, 09:00pm until July 4, 09:00pm
Extreme Heat Warning July 1, 12:00pm until July 1, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch
Extreme Heat Warning

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 91. Southwest wind 8 to 10 mph.

    High: 91 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 70. Southwest wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 70 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 97. Heat index values as high as 107. Southwest wind around 9 mph.

    High: 97 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. Southwest wind around 7 mph.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. West wind 3 to 8 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 79.

    Low: 79 °F

    Clear

  • Friday

    Friday: A 30 percent chance of showers after 2pm. Sunny, then becoming partly sunny during the afternoon and hot, with a high near 100.

    High: 100 °F

    Sunny then
    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    Showers then
    Partly Cloudy

  • Independence Day

    Independence Day: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 98.

    High: 98 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 91. Southwest wind 8 to 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 70. Southwest wind 8 to 10 mph, with gusts as high as 21 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 97. Heat index values as high as 107. Southwest wind around 9 mph.
Wednesday Night
Mostly clear, with a low around 75. Southwest wind around 7 mph.
Thursday
Sunny and hot, with a high near 101. West wind 3 to 8 mph.
Thursday Night
Clear, with a low around 79.
Friday
A 30 percent chance of showers after 2pm. Sunny, then becoming partly sunny during the afternoon and hot, with a high near 100.
Friday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 76.
Independence Day
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 98.
Saturday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 30%.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
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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:
7:08 am EDT Jun 30, 2026
Forecast Valid:
12pm EDT Jun 30, 2026-6pm EDT Jul 6, 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