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 >

Current conditions at

Trenton, Mercer County Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Partly Cloudy

88°F

31°C

Humidity 46%
Wind Speed SW 7 mph
Barometer 30.08 in (1017.6 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 21 Jun 4:53 pm EDT
Extended Forecast for

Monmouth Junction NJ

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

    Tonight: Partly cloudy, with a low around 71. Southwest wind 5 to 10 mph becoming light.

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 97. Heat index values as high as 104. West wind 10 to 15 mph.

    High: 97 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77. West wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 101. Heat index values as high as 109. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 101 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. West wind around 5 mph becoming calm.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 96.

    High: 96 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 72.

    Low: 72 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 71. Southwest wind 5 to 10 mph becoming light.
Sunday
Mostly sunny and hot, with a high near 97. Heat index values as high as 104. West wind 10 to 15 mph.
Sunday Night
Mostly clear, with a low around 77. West wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 101. Heat index values as high as 109. Calm wind becoming northwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 78. West wind around 5 mph becoming calm.
Tuesday
Sunny and hot, with a high near 101.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Mostly sunny, with a high near 96.
Wednesday Night
Mostly cloudy, with a low around 72.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
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 84. Chance of precipitation is 40%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Monmouth Junction NJ
 40.38°N 74.55°W (Elev. 98 ft)
4:12 pm EDT Jun 21, 2025
5pm EDT Jun 21, 2025-6pm EDT Jun 28, 2025
 
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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