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

Dangerous Heat and Humidity Today through Saturday

Dangerously hot and humid conditions are expected to build starting today through Saturday. Additionally, there will be a threat of thunderstorms on some of the days. View this briefing for details. Read More >

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

A Few Clouds

93°F

34°C

Humidity 56%
Wind Speed S 7 G 16 mph
Barometer 29.98 in (1014.4 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 1 Jul 1:53 pm EDT
Extended Forecast for

2 Miles SSE Lambertville NJ

Extreme Heat Warning July 1, 02:01pm until July 4, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 1, 02:01pm until July 4, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • This Afternoon

    High: 98 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 9pm. Some of the storms could be severe. Partly cloudy, with a low around 76. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.

    Low: 76 °F

    Severe
    Thunderstorms
    then Mostly
    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 104. Heat index values as high as 112. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 104 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79. West wind around 5 mph becoming calm after midnight.

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 103. West wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 103 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    T-storms

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 100. Chance of precipitation is 30%.

    High: 100 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Scattered showers and thunderstorms, mainly after 5pm. Some of the storms could be severe. Mostly sunny and hot, with a high near 98. Heat index values as high as 106. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Tonight
Scattered showers and thunderstorms, mainly before 9pm. Some of the storms could be severe. Partly cloudy, with a low around 76. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
Thursday
Sunny and hot, with a high near 104. Heat index values as high as 112. West wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 79. West wind around 5 mph becoming calm after midnight.
Friday
A slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 103. West wind 5 to 10 mph. Chance of precipitation is 20%.
Friday Night
A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Chance of precipitation is 20%.
Independence Day
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 100. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.
Sunday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 95. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 90. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Lambertville NJ
 40.33°N 74.94°W (Elev. 138 ft)
Last Update:
1:23 pm EDT Jul 1, 2026
Forecast Valid:
2pm EDT Jul 1, 2026-6pm EDT Jul 7, 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