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Briefing for Late June Heat Wave

An early season heat wave will bring dangerously hot and humid conditions across most of the region beginning Sunday through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Morristown Municipal (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Clear

75°F

24°C

Humidity 65%
Wind Speed W 5 mph
Barometer 30.01 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 20 Jun 9:45 pm EDT
Extended Forecast for

Boonton NJ

Extreme Heat Watch June 22, 08:00am until June 25, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Tonight

    Tonight: Partly cloudy, with a low around 65. West wind around 5 mph.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 88 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 95. Heat index values as high as 101. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 95 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. West wind around 5 mph becoming calm in the evening.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 65. West wind around 5 mph.
Saturday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 95. Heat index values as high as 101. West wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 76. West wind around 5 mph becoming calm in the evening.
Monday
Sunny and hot, with a high near 99.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny and hot, with a high near 100.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Mostly sunny, with a high near 95.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 87. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Boonton NJ
 40.89°N 74.42°W (Elev. 318 ft)
Last Update:
4:11 pm EDT Jun 20, 2025
Forecast Valid:
10pm EDT Jun 20, 2025-6pm EDT Jun 27, 2025
 
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