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

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

74°F

23°C

Humidity 69%
Wind Speed SW 5 mph
Barometer 30.11 in (1018.8 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 17 May 10:53 pm EDT
Extended Forecast for

Trenton NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 66. Southwest wind around 5 mph.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 94. Light southeast wind becoming south 5 to 10 mph in the afternoon.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 69. South wind around 5 mph.

    Low: 69 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72. Southwest wind 5 to 10 mph.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after 2pm. High near 94. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 94 °F

    Sunny then
    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Low around 56. Chance of precipitation is 80%.

    Low: 56 °F

    Showers then
    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 66. Southwest wind around 5 mph.
Monday
Sunny, with a high near 94. Light southeast wind becoming south 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 69. South wind around 5 mph.
Tuesday
Sunny, with a high near 96. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 72. Southwest wind 5 to 10 mph.
Wednesday
Showers and possibly a thunderstorm after 2pm. High near 94. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Low around 56. Chance of precipitation is 80%.
Thursday
Partly sunny, with a high near 72.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
A chance of showers after 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 30%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.
Saturday
Showers likely. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Sunday
A chance of showers. Mostly cloudy, with a high near 74. Chance of precipitation is 50%.
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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:
4:09 pm EDT May 17, 2026
Forecast Valid:
11pm EDT May 17, 2026-6pm EDT May 24, 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