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

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Morristown Airport (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Partly Cloudy

88°F

31°C

Humidity 40%
Wind Speed SE 5 mph
Barometer 30.08 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 29 Jun 3:45 pm EDT
Extended Forecast for

Summit NJ

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

  • Tonight

    Tonight: Mostly clear, with a low around 65. South wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 92. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 21 mph.

    High: 92 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 70. Southwest wind 5 to 13 mph.

    Low: 70 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 98. Heat index values as high as 106. West wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 98 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. Southwest wind around 6 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 102.

    High: 102 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 78.

    Low: 78 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 102.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: A chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 76. Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 65. South wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 92. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 70. Southwest wind 5 to 13 mph.
Wednesday
Mostly sunny, with a high near 98. Heat index values as high as 106. West wind 6 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 77. Southwest wind around 6 mph.
Thursday
Sunny and hot, with a high near 102.
Thursday Night
Clear, with a low around 78.
Friday
Sunny and hot, with a high near 102.
Friday Night
A chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 76. Chance of precipitation is 30%.
Independence Day
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 99.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
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 70.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Summit NJ
 40.71°N 74.39°W (Elev. 230 ft)
Last Update:
2:56 pm EDT Jun 29, 2026
Forecast Valid:
3pm EDT Jun 29, 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