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

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. this week. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England today. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Overcast

82°F

28°C

Humidity 51%
Wind Speed W 12 G 23 mph
Barometer 29.59 in (1001.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 29 Jul 3:53 pm EDT
Extended Forecast for

Trenton NJ

  • This Afternoon

    This Afternoon: Isolated showers and thunderstorms. Partly sunny, with a high near 82. Northwest wind around 15 mph. Chance of precipitation is 20%.

    High: 82 °F

    Isolated
    T-storms

  • Tonight

    Tonight: Isolated showers and thunderstorms before 8pm, then isolated showers after 2am. Mostly cloudy, with a low around 63. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 63 °F

    Mostly Cloudy
    then Isolated
    Showers

  • Thursday

    Thursday: Isolated showers before 8am, then isolated showers and thunderstorms after 2pm. Partly sunny, with a high near 80. North wind 10 to 15 mph. Chance of precipitation is 20%.

    High: 80 °F

    Mostly Cloudy
    then Isolated
    T-storms

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 63. North wind around 5 mph.

    Low: 63 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 85. North wind around 5 mph becoming southwest in the afternoon.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers after 2pm. Mostly cloudy, with a high near 84. Chance of precipitation is 30%.

    High: 84 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

This Afternoon
Isolated showers and thunderstorms. Partly sunny, with a high near 82. Northwest wind around 15 mph. Chance of precipitation is 20%.
Tonight
Isolated showers and thunderstorms before 8pm, then isolated showers after 2am. Mostly cloudy, with a low around 63. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Thursday
Isolated showers before 8am, then isolated showers and thunderstorms after 2pm. Partly sunny, with a high near 80. North wind 10 to 15 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 63. North wind around 5 mph.
Friday
Sunny, with a high near 85. North wind around 5 mph becoming southwest in the afternoon.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Partly sunny, with a high near 86.
Saturday Night
Mostly cloudy, with a low around 67.
Sunday
A chance of showers after 2pm. Mostly cloudy, with a high near 84. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Monday Night
A chance of thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Trenton NJ
 40.22°N 74.75°W (Elev. 23 ft)
Last Update:
3:20 pm EDT Jul 29, 2026
Forecast Valid:
4pm EDT Jul 29, 2026-6pm EDT Aug 5, 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