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

45°F

7°C

Humidity 58%
Wind Speed SE 9 mph
Barometer 30.23 in (1023.1 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 21 Apr 11:53 pm EDT
Extended Forecast for

Princeton North NJ

  • Overnight

    Overnight: A chance of showers, mainly after 3am. Cloudy, with a low around 43. South wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers between 8am and noon. Mostly cloudy, 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
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44. North wind around 5 mph becoming calm.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 73. Northwest wind 5 to 10 mph.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 47. Northwest wind around 5 mph becoming calm in the evening.

    Low: 47 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers. Partly sunny, with a high near 63. Chance of precipitation is 20%.

    High: 63 °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

Overnight
A chance of showers, mainly after 3am. Cloudy, with a low around 43. South wind 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 8am and noon. Mostly cloudy, 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 44. North wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 73. Northwest wind 5 to 10 mph.
Thursday Night
Mostly cloudy, with a low around 47. Northwest wind around 5 mph becoming calm in the evening.
Friday
A slight chance of showers. Partly sunny, with a high near 63. 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 58. 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 45. Chance of precipitation is 30%.
Tuesday
A chance of showers. Partly sunny, with a high near 65. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton North NJ
 40.37°N 74.64°W (Elev. 98 ft)
Last Update:
4:11 pm EDT Apr 21, 2026
Forecast Valid:
12am EDT Apr 22, 2026-6pm EDT Apr 28, 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