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

64°F

18°C

Humidity 93%
Wind Speed Calm
Barometer 30.08 in (1017.9 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 25 May 11:53 pm EDT
Extended Forecast for

Trenton NJ

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Patchy Fog

  • Tuesday

    Tuesday: Partly sunny, with a high near 82. Northeast wind around 5 mph becoming calm.

    High: 82 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 63. Southwest wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 63 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 2pm. Mostly cloudy, with a high near 83. West wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 83 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 62. Calm wind becoming northwest around 5 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 59. Calm wind.
Tuesday
Partly sunny, with a high near 82. Northeast wind around 5 mph becoming calm.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 63. Southwest wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers before 2pm. Mostly cloudy, with a high near 83. West wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 62. Calm wind becoming northwest around 5 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 53.
Monday
Sunny, with a high near 76.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Trenton NJ
 40.22°N 74.75°W (Elev. 23 ft)
Last Update:
9:51 pm EDT May 25, 2026
Forecast Valid:
12am EDT May 26, 2026-6pm EDT Jun 1, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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