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

27°F

-3°C

Humidity 92%
Wind Speed W 7 mph
Barometer 29.86 in (1010.9 mb)
Dewpoint 25°F (-4°C)
Visibility 2.00 mi
Wind Chill19°F (-7°C)
Last update 18 Jan 9:53 pm EST
Extended Forecast for

Trenton NJ

  • Tonight

    Tonight: A slight chance of snow before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 18. West wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 18 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 34. Southwest wind 5 to 15 mph.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 13. West wind around 10 mph, with gusts as high as 20 mph.

    Low: 13 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 23. West wind 10 to 15 mph.

    High: 23 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 7. West wind around 5 mph becoming calm in the evening.

    Low: 7 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of rain after 1pm. Partly sunny, with a high near 40. Chance of precipitation is 30%.

    High: 40 °F

    Partly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 17.

    Low: 17 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of snow before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 18. West wind 5 to 10 mph. Chance of precipitation is 20%.
M.L.King Day
Mostly sunny, with a high near 34. Southwest wind 5 to 15 mph.
Monday Night
Mostly clear, with a low around 13. West wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 23. West wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 7. West wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
A chance of rain after 1pm. Partly sunny, with a high near 40. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 17.
Friday
Mostly sunny, with a high near 30.
Friday Night
Partly cloudy, with a low around 18.
Saturday
A chance of snow. Partly sunny, with a high near 29. Chance of precipitation is 30%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.
Sunday
A chance of snow. Partly sunny, with a high near 23. Chance of precipitation is 40%.
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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:
8:03 pm EST Jan 18, 2026
Forecast Valid:
9pm EST Jan 18, 2026-6pm EST Jan 25, 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