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

79°F

26°C

Humidity 32%
Wind Speed SW 5 mph
Barometer 30.06 in (1017.1 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 26 May 3:53 pm EDT
Extended Forecast for

Princeton North NJ

  • Tonight

    Tonight: A chance of showers, mainly after 4am. Mostly cloudy, with a low around 61. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers between 10am and noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 82. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 82 °F

    Chance
    Showers and
    Patchy Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: A chance of showers between 9pm and 2am. Mostly cloudy, with a low around 60. West wind around 5 mph becoming north after midnight. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 60 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 78. Northwest wind 5 to 10 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. North wind around 5 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers, mainly after 4am. Mostly cloudy, with a low around 61. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers between 10am and noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 82. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of showers between 9pm and 2am. Mostly cloudy, with a low around 60. West wind around 5 mph becoming north after midnight. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 78. Northwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 54. North wind around 5 mph.
Friday
Sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 53.
Monday
A chance of showers. Mostly sunny, with a high near 73. Chance of precipitation is 30%.
Monday Night
A chance of showers. Partly cloudy, with a low around 52. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton North NJ
 40.34°N 74.64°W (Elev. 98 ft)
Last Update:
4:07 pm EDT May 26, 2026
Forecast Valid:
4pm EDT May 26, 2026-6pm EDT Jun 2, 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