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

69°F

21°C

Humidity 42%
Wind Speed Vrbl 6 mph
Barometer 29.94 in (1013.3 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 23 Apr 11:53 am EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • This Afternoon

    This Afternoon: Sunny, with a high near 75. Northwest wind 10 to 15 mph.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 47. North wind 5 to 10 mph.

    Low: 47 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 68. Calm wind becoming north around 5 mph.

    High: 68 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of showers, mainly after 2am. Mostly cloudy, with a low around 46. Calm wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Showers, mainly after 8am. High near 52. East wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 52 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before 2am. Cloudy, with a low around 42. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 8am. Mostly cloudy, with a high near 58. Chance of precipitation is 30%.

    High: 58 °F

    Chance
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 75. Northwest wind 10 to 15 mph.
Tonight
Increasing clouds, with a low around 47. North wind 5 to 10 mph.
Friday
Partly sunny, with a high near 68. Calm wind becoming north around 5 mph.
Friday Night
A chance of showers, mainly after 2am. Mostly cloudy, with a low around 46. Calm wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Showers, mainly after 8am. High near 52. East wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Showers likely, mainly before 2am. Cloudy, with a low around 42. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
A chance of showers before 8am. Mostly cloudy, with a high near 58. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 64.
Monday Night
A chance of showers after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 30%.
Tuesday
Showers likely. Mostly cloudy, with a high near 62. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Trenton, Mercer County Airport NJ
 40.28°N 74.83°W (Elev. 200 ft)
Last Update:
4:08 am EDT Apr 23, 2026
Forecast Valid:
12pm EDT Apr 23, 2026-6pm EDT Apr 29, 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