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.

Overcast

52°F

11°C

Humidity 27%
Wind Speed S 6 mph
Barometer 30.21 in (1022.4 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 21 Apr 6:53 pm EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Tonight

    Tonight: A chance of showers, mainly after 2am. Increasing clouds, with a low around 43. South wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 63. South wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Chance
    Showers then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. North wind around 5 mph becoming calm.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 72. Northwest wind 5 to 10 mph.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47. North wind around 5 mph.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers. Partly sunny, with a high near 62. Chance of precipitation is 20%.

    High: 62 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 43. Chance of precipitation is 50%.

    Low: 43 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely. Mostly cloudy, with a high near 52. Chance of precipitation is 60%.

    High: 52 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 42. Chance of precipitation is 50%.

    Low: 42 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers, mainly after 2am. Increasing clouds, with a low around 43. South wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 63. South wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Partly cloudy, with a low around 45. North wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 72. Northwest wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 47. North wind around 5 mph.
Friday
A slight chance of showers. Partly sunny, with a high near 62. Chance of precipitation is 20%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 43. Chance of precipitation is 50%.
Saturday
Showers likely. Mostly cloudy, with a high near 52. Chance of precipitation is 60%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 42. Chance of precipitation is 50%.
Sunday
A chance of showers before 2pm. Mostly cloudy, with a high near 59. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 64.
Monday Night
A chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.
Tuesday
A chance of showers. Partly sunny, with a high near 66. Chance of precipitation is 50%.
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Forecast Area
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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:
4:11 pm EDT Apr 21, 2026
Forecast Valid:
6pm EDT Apr 21, 2026-6pm EDT Apr 28, 2026
 
Forecast Discussion
 
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Additional Resources

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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