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

20°F

-7°C

Humidity 34%
Wind Speed W 16 G 30 mph
Barometer 30.35 in (1027.3 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill6°F (-14°C)
Last update 20 Jan 2:53 pm EST
Extended Forecast for

Trenton NJ

  • Tonight

    Tonight: Mostly clear, with a low around 5. West wind 5 to 10 mph becoming light southwest in the evening.

    Low: 5 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 34. Light south wind increasing to 10 to 15 mph in the morning.

    High: 34 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Cloudy, then gradually becoming partly cloudy, with a low around 29. Southwest wind 5 to 10 mph.

    Low: 29 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 44. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 44 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24. West wind around 5 mph becoming calm in the evening.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 9.

    Low: 9 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 18.

    High: 18 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly after 1am. Cloudy, with a low around 11. Chance of precipitation is 60%.

    Low: 11 °F

    Chance Snow
    then Snow
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 5. West wind 5 to 10 mph becoming light southwest in the evening.
Wednesday
Increasing clouds, with a high near 34. Light south wind increasing to 10 to 15 mph in the morning.
Wednesday Night
Cloudy, then gradually becoming partly cloudy, with a low around 29. Southwest wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 44. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 24. West wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 33.
Friday Night
Mostly cloudy, with a low around 9.
Saturday
Partly sunny, with a high near 18.
Saturday Night
Snow likely, mainly after 1am. Cloudy, with a low around 11. Chance of precipitation is 60%.
Sunday
Snow likely. Cloudy, with a high near 20. Chance of precipitation is 70%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 8. Chance of precipitation is 50%.
Monday
A chance of snow. Partly sunny, with a high near 24. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 8.
Tuesday
Mostly sunny, with a high near 25.
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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:
1:52 pm EST Jan 20, 2026
Forecast Valid:
3pm EST Jan 20, 2026-6pm EST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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