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.

A Few Clouds

27°F

-3°C

Humidity 43%
Wind Speed W 13 G 25 mph
Barometer 29.55 in (1000.4 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 15 Jan 4:53 pm EST
Extended Forecast for

Trenton NJ

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 21. West wind around 15 mph, with gusts as high as 30 mph.

    Low: 21 °F

    Decreasing
    Clouds

  • Friday

    Friday: Increasing clouds, with a high near 35. West wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 35 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A chance of snow after 1am. Increasing clouds, with a low around 26. South wind around 5 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Partly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: A chance of snow before 10am, then a chance of rain and snow between 10am and 4pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 42. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of snow. Mostly cloudy, with a high near 34. Chance of precipitation is 20%.

    High: 34 °F

    Slight Chance
    Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 34.

    High: 34 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 13.

    Low: 13 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 21. West wind around 15 mph, with gusts as high as 30 mph.
Friday
Increasing clouds, with a high near 35. West wind 10 to 15 mph, with gusts as high as 30 mph.
Friday Night
A chance of snow after 1am. Increasing clouds, with a low around 26. South wind around 5 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Saturday
A chance of snow before 10am, then a chance of rain and snow between 10am and 4pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 42. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Saturday Night
Mostly cloudy, with a low around 28. Calm wind.
Sunday
A slight chance of snow. Mostly cloudy, with a high near 34. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 19.
M.L.King Day
Sunny, with a high near 34.
Monday Night
Mostly clear, with a low around 13.
Tuesday
Sunny, with a high near 21.
Tuesday Night
Mostly clear, with a low around 10.
Wednesday
Mostly sunny, with a high near 30.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
Mostly sunny, with a high near 36.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Trenton NJ
 40.23°N 74.78°W (Elev. 33 ft)
Last Update:
4:11 pm EST Jan 15, 2026
Forecast Valid:
5pm EST Jan 15, 2026-6pm EST Jan 22, 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