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

17°F

-8°C

Humidity 54%
Wind Speed NW 12 G 21 mph
Barometer 30.18 in (1021.7 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 14 Dec 11:53 pm EST
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Overnight

    Overnight: Mostly clear, with a low around 13. Wind chill values as low as zero. Northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 13 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of snow showers after 3pm. Increasing clouds, with a high near 29. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 29 °F

    Sunny then
    Slight Chance
    Snow Showers

  • Monday Night

    Monday Night: Cloudy, then gradual clearing toward daybreak, with a low around 16. West wind around 5 mph becoming calm in the evening.

    Low: 16 °F

    Clearing Late

  • Tuesday

    Tuesday: Mostly sunny, with a high near 31. Calm wind becoming west around 5 mph.

    High: 31 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 20. Calm wind becoming southwest around 5 mph.

    Low: 20 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Rain. Low around 36. Chance of precipitation is 90%.

    Low: 36 °F

    Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 13. Wind chill values as low as zero. Northwest wind around 10 mph, with gusts as high as 20 mph.
Monday
A slight chance of snow showers after 3pm. Increasing clouds, with a high near 29. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday Night
Cloudy, then gradual clearing toward daybreak, with a low around 16. West wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 31. Calm wind becoming west around 5 mph.
Tuesday Night
Partly cloudy, with a low around 20. Calm wind becoming southwest around 5 mph.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Partly cloudy, with a low around 24.
Thursday
Partly sunny, with a high near 51.
Thursday Night
Rain. Low around 36. Chance of precipitation is 90%.
Friday
A chance of rain before 1pm. Partly sunny, with a high near 48. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 21.
Saturday
Partly sunny, with a high near 38.
Saturday Night
Mostly cloudy, with a low around 30.
Sunday
Mostly cloudy, with a high near 47.
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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:
4:10 pm EST Dec 14, 2025
Forecast Valid:
12am EST Dec 15, 2025-6pm EST Dec 21, 2025
 
Forecast Discussion
 
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Additional Resources

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