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.

Fog/Mist

24°F

-4°C

Humidity 88%
Wind Speed Calm
Barometer 30.05 in (1017.3 mb)
Dewpoint 21°F (-6°C)
Visibility 6.00 mi
Last update 15 Feb 6:53 am EST
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Today

    Today: Mostly cloudy, with a high near 41. Calm wind becoming east around 5 mph in the afternoon.

    High: 41 °F

    Mostly Cloudy

  • Tonight

    Tonight: Snow, possibly mixed with rain before 3am, then a chance of snow. Low around 30. Northeast wind around 5 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 30 °F

    Snow then
    Rain/Snow
    Likely

  • Washington's Birthday

    Washington's Birthday: Mostly cloudy, with a high near 40. Northeast wind 5 to 10 mph.

    High: 40 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 47. West wind around 5 mph.

    High: 47 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Cloudy, with a high near 44. Chance of precipitation is 50%.

    High: 44 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 40%.

    Low: 36 °F

    Chance Rain

  • Thursday

    Thursday: Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly cloudy, with a high near 41. Calm wind becoming east around 5 mph in the afternoon.
Tonight
Snow, possibly mixed with rain before 3am, then a chance of snow. Low around 30. Northeast wind around 5 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Washington's Birthday
Mostly cloudy, with a high near 40. Northeast wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 30. Calm wind.
Tuesday
Partly sunny, with a high near 47. West wind around 5 mph.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
A chance of rain. Cloudy, with a high near 44. Chance of precipitation is 50%.
Wednesday Night
A chance of rain before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 40%.
Thursday
Mostly cloudy, with a high near 48.
Thursday Night
A chance of rain after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Friday
Rain likely. Mostly cloudy, with a high near 46. Chance of precipitation is 70%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 33. Chance of precipitation is 40%.
Saturday
A chance of rain. Partly sunny, with a high near 44. 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
 40.27°N 74.8°W (Elev. 157 ft)
Last Update:
4:14 am EST Feb 15, 2026
Forecast Valid:
6am EST Feb 15, 2026-6pm EST Feb 21, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation