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.

Overcast

34°F

1°C

Humidity 85%
Wind Speed Calm
Barometer 30.17 in (1021.1 mb)
Dewpoint 30°F (-1°C)
Visibility 8.00 mi
Last update 17 Feb 2:53 am EST
Extended Forecast for

Trenton NJ

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 29. Calm wind.

    Low: 29 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 46. Calm wind becoming southwest around 5 mph.

    High: 46 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Cloudy, with a high near 49. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 49 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A slight chance of rain before 1am. Mostly cloudy, with a low around 37. Southwest wind around 5 mph becoming northwest after midnight. Chance of precipitation is 20%.

    Low: 37 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: A slight chance of rain after 1pm. Mostly cloudy, with a high near 49. Chance of precipitation is 20%.

    High: 49 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 50%.

    Low: 34 °F

    Chance Rain

  • Friday

    Friday: Rain. High near 44. Chance of precipitation is 90%.

    High: 44 °F

    Rain

  • Friday Night

    Friday Night: A chance of rain before 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 29. Calm wind.
Tuesday
Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 46. Calm wind becoming southwest around 5 mph.
Tuesday Night
Mostly cloudy, with a low around 34. Calm wind.
Wednesday
A chance of rain. Cloudy, with a high near 49. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A slight chance of rain before 1am. Mostly cloudy, with a low around 37. Southwest wind around 5 mph becoming northwest after midnight. Chance of precipitation is 20%.
Thursday
A slight chance of rain after 1pm. Mostly cloudy, with a high near 49. Chance of precipitation is 20%.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 50%.
Friday
Rain. High near 44. Chance of precipitation is 90%.
Friday Night
A chance of rain before 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.
Saturday
Mostly cloudy, with a high near 46.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
A chance of rain and snow. Partly sunny, with a high near 41. Chance of precipitation is 40%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 38.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Trenton NJ
 40.23°N 74.78°W (Elev. 33 ft)
Last Update:
4:16 pm EST Feb 16, 2026
Forecast Valid:
3am EST Feb 17, 2026-6pm EST Feb 23, 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