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.

Light Rain

54°F

12°C

Humidity 97%
Wind Speed Calm
Barometer 29.81 in (1008.9 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 5 Apr 12:53 pm EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. Steady temperature around 60. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 60 °F

    Showers

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 38. West wind around 10 mph.

    Low: 38 °F

    Gradual
    Clearing

  • Monday

    Monday: Sunny, with a high near 56. West wind 10 to 15 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 38. West wind around 5 mph. Chance of precipitation is 20%.

    Low: 38 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 49. West wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 49 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 27.

    Low: 27 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Steady temperature around 60. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 38. West wind around 10 mph.
Monday
Sunny, with a high near 56. West wind 10 to 15 mph.
Monday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 38. West wind around 5 mph. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 49. West wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday Night
Clear, with a low around 27.
Wednesday
Sunny, with a high near 52.
Wednesday Night
Mostly clear, with a low around 33.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 72.
Friday Night
Mostly clear, with a low around 48.
Saturday
Mostly sunny, with a high near 73.
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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:
5:48 am EDT Apr 5, 2026
Forecast Valid:
1pm EDT Apr 5, 2026-6pm EDT Apr 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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