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.

Mostly Cloudy

60°F

16°C

Humidity 65%
Wind Speed NE 6 mph
Barometer 29.96 in (1014.1 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 22 Apr 4:53 pm EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 45. Northeast wind around 5 mph becoming calm.

    Low: 45 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 75. Northwest wind 5 to 10 mph.

    High: 75 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49. Northwest wind around 5 mph becoming calm in the evening.

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 67. Calm wind becoming north around 5 mph.

    High: 67 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of showers, mainly after 2am. Mostly cloudy, with a low around 45. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely, mainly after 8am. Mostly cloudy, with a high near 51. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 51 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly before 2am. Cloudy, with a low around 42. Chance of precipitation is 70%.

    Low: 42 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 2pm. Mostly cloudy, with a high near 60. Chance of precipitation is 30%.

    High: 60 °F

    Chance
    Showers

  • Sunday Night

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

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 45. Northeast wind around 5 mph becoming calm.
Thursday
Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 75. Northwest wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 49. Northwest wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 67. Calm wind becoming north around 5 mph.
Friday Night
A chance of showers, mainly after 2am. Mostly cloudy, with a low around 45. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 51. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Showers likely, mainly before 2am. Cloudy, with a low around 42. Chance of precipitation is 70%.
Sunday
A chance of showers before 2pm. Mostly cloudy, with a high near 60. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 65.
Monday Night
A chance of showers. 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 60%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 63. 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:
4:09 pm EDT Apr 22, 2026
Forecast Valid:
5pm EDT Apr 22, 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