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

29°F

-2°C

Humidity 89%
Wind Speed Calm
Barometer 29.82 in (1009.3 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 26 Feb 4:53 am EST
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Today

    Today: A chance of snow, mainly between 2pm and 4pm. Partly sunny, with a high near 41. West wind around 5 mph becoming southeast in the afternoon. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 41 °F

    Partly Sunny
    then Chance
    Snow

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Northeast wind around 5 mph becoming calm.

    Low: 23 °F

    Partly Cloudy

  • Friday

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

    High: 45 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 28. South wind around 5 mph becoming calm.

    Low: 28 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 53. Southwest wind around 5 mph.

    High: 53 °F

    Sunny

  • Saturday Night

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

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Sunday Night

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

    Low: 16 °F

    Partly Cloudy

  • Monday

    Monday: A chance of snow. Mostly cloudy, with a high near 28. Chance of precipitation is 50%.

    High: 28 °F

    Chance Snow

Detailed Forecast

Today
A chance of snow, mainly between 2pm and 4pm. Partly sunny, with a high near 41. West wind around 5 mph becoming southeast in the afternoon. Chance of precipitation is 30%. Little or no snow accumulation expected.
Tonight
Partly cloudy, with a low around 23. Northeast wind around 5 mph becoming calm.
Friday
Sunny, with a high near 45. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 28. South wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 53. Southwest wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Partly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 16.
Monday
A chance of snow. Mostly cloudy, with a high near 28. Chance of precipitation is 50%.
Monday Night
A chance of snow. Mostly cloudy, with a low around 18. Chance of precipitation is 30%.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 40%.
Tuesday Night
Rain and snow likely. Mostly cloudy, with a low around 29. Chance of precipitation is 60%.
Wednesday
A chance of rain. Partly sunny, with a high near 44. Chance of precipitation is 30%.
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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:
4:12 am EST Feb 26, 2026
Forecast Valid:
5am EST Feb 26, 2026-6pm EST Mar 4, 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