National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Weekend Nor'easter

Coastal flooding, strong winds, dangerous rip currents, high surf, and hazardous marine conditions are expected from a nor'easter impacting the region through this weekend. View this briefing for more details. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Light Rain Fog/Mist

64°F

18°C

Humidity 93%
Wind Speed NE 15 G 24 mph
Barometer 29.60 in (1001.9 mb)
Dewpoint 62°F (17°C)
Visibility 6.00 mi
Last update 27 Sep 1:53 pm EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • This Afternoon

    This Afternoon: A chance of showers. Cloudy, with a high near 66. Northeast wind around 15 mph, with gusts as high as 40 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Chance
    Showers

  • Tonight

    Tonight: Showers, mainly before 4am. Low around 57. North wind 10 to 15 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 10am. Mostly cloudy, with a high near 66. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 66 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 54. North wind around 5 mph.

    Low: 54 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 73. Northwest wind around 5 mph.

    High: 73 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A chance of showers. Cloudy, with a high near 66. Northeast wind around 15 mph, with gusts as high as 40 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Showers, mainly before 4am. Low around 57. North wind 10 to 15 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Showers likely, mainly before 10am. Mostly cloudy, with a high near 66. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly cloudy, with a low around 54. North wind around 5 mph.
Tuesday
Partly sunny, with a high near 73. Northwest wind around 5 mph.
Tuesday Night
Mostly cloudy, with a low around 55.
Wednesday
Mostly sunny, with a high near 76.
Wednesday Night
Mostly cloudy, with a low around 58.
Thursday
Partly sunny, with a high near 80.
Thursday Night
Mostly cloudy, with a low around 62.
Friday
Partly sunny, with a high near 77.
Friday Night
Mostly cloudy, with a low around 56.
Saturday
Partly sunny, with a high near 71.
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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 am EDT Sep 27, 2026
Forecast Valid:
2pm EDT Sep 27, 2026-6pm EDT Oct 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation