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.

Rain Fog/Mist

39°F

4°C

Humidity 96%
Wind Speed E 9 mph
Barometer 30.23 in (1023.3 mb)
Dewpoint 38°F (3°C)
Visibility 5.00 mi
Wind Chill33°F (1°C)
Last update 5 Mar 11:53 pm EST
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Overnight

    Overnight: Rain, mainly before 2am. Patchy fog before 1am, then patchy fog after 2am. Low around 36. Northeast wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Rain and
    Patchy Fog

  • Friday

    Friday: Areas of fog. Otherwise, cloudy, with a high near 45. Northeast wind around 10 mph.

    High: 45 °F

    Areas Fog

  • Friday Night

    Friday Night: A chance of rain before 11pm, then a chance of rain after 1am. Areas of fog. Otherwise, cloudy, with a low around 38. Northeast wind 5 to 10 mph. Chance of precipitation is 40%.

    Low: 38 °F

    Chance Rain
    and Areas Fog

  • Saturday

    Saturday: Patchy fog before 1pm. Otherwise, cloudy, with a high near 57. Calm wind becoming south around 5 mph in the afternoon.

    High: 57 °F

    Patchy Fog

  • Saturday Night

    Saturday Night: Showers. Patchy fog before 1am. Low around 49. South wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Showers and
    Patchy Fog

  • Sunday

    Sunday: A slight chance of showers. Partly sunny, with a high near 65. Chance of precipitation is 20%.

    High: 65 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Overnight
Rain, mainly before 2am. Patchy fog before 1am, then patchy fog after 2am. Low around 36. Northeast wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Areas of fog. Otherwise, cloudy, with a high near 45. Northeast wind around 10 mph.
Friday Night
A chance of rain before 11pm, then a chance of rain after 1am. Areas of fog. Otherwise, cloudy, with a low around 38. Northeast wind 5 to 10 mph. Chance of precipitation is 40%.
Saturday
Patchy fog before 1pm. Otherwise, cloudy, with a high near 57. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Showers. Patchy fog before 1am. Low around 49. South wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A slight chance of showers. Partly sunny, with a high near 65. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Mostly sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 49.
Tuesday
Mostly sunny, with a high near 73.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Wednesday
A chance of rain. Mostly cloudy, with a high near 73. Chance of precipitation is 30%.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Thursday
A chance of rain. Mostly cloudy, with a high near 57. Chance of precipitation is 50%.
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:
12:00 am EST Mar 6, 2026
Forecast Valid:
12am EST Mar 6, 2026-6pm EDT Mar 12, 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