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

24°F

-4°C

Humidity 75%
Wind Speed Calm
Barometer 30.08 in (1018.1 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 27 Feb 6:53 am EST
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Today

    Today: Sunny, with a high near 45. Calm wind becoming south around 5 mph in the afternoon.

    High: 45 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 25. Southeast wind around 5 mph becoming calm.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 52. Calm wind becoming southwest around 5 mph.

    High: 52 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of rain and snow before 10am, then a chance of snow between 10am and 1pm. Partly sunny, with a high near 40. Northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Monday

    Monday: A chance of snow after 1pm. Mostly cloudy, with a high near 30. Chance of precipitation is 30%.

    High: 30 °F

    Mostly Cloudy
    then Chance
    Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 40%.

    High: 40 °F

    Chance
    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 45. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 25. Southeast wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 52. Calm wind becoming southwest around 5 mph.
Saturday Night
Partly cloudy, with a low around 31. Calm wind.
Sunday
A chance of rain and snow before 10am, then a chance of snow between 10am and 1pm. Partly sunny, with a high near 40. Northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Sunday Night
Partly cloudy, with a low around 16.
Monday
A chance of snow after 1pm. Mostly cloudy, with a high near 30. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 18.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 40%.
Tuesday Night
Rain likely. Cloudy, with a low around 32. Chance of precipitation is 70%.
Wednesday
A chance of rain. Mostly cloudy, with a high near 48. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 34.
Thursday
A chance of rain. Cloudy, with a high near 52. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Trenton, Mercer County Airport NJ
 40.28°N 74.83°W (Elev. 200 ft)
Last Update:
4:09 am EST Feb 27, 2026
Forecast Valid:
7am EST Feb 27, 2026-6pm EST Mar 5, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation