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

55°F

13°C

Humidity 57%
Wind Speed Calm
Barometer 29.97 in (1014.0 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 11 Mar 2:53 am EDT
Extended Forecast for

Princeton North NJ

  • Overnight

    Overnight: Mostly clear, with a low around 49. South wind around 5 mph.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers, mainly between 2pm and 3pm. Partly sunny, with a high near 77. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 77 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 51. South wind 10 to 15 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 51 °F

    Chance
    Showers

  • Thursday

    Thursday: Rain showers likely before 5pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 58. Northwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 58 °F

    Showers
    Likely then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow showers before 8pm. Mostly clear, with a low around 31. West wind 5 to 10 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 31 °F

    Chance
    Rain/Snow
    then Clear

  • Friday

    Friday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 49. South wind around 5 mph.
Wednesday
A chance of showers, mainly between 2pm and 3pm. Partly sunny, with a high near 77. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 51. South wind 10 to 15 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Rain showers likely before 5pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 58. Northwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday Night
A chance of rain and snow showers before 8pm. Mostly clear, with a low around 31. West wind 5 to 10 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday
Partly sunny, with a high near 49.
Friday Night
Partly cloudy, with a low around 37.
Saturday
Sunny, with a high near 51.
Saturday Night
Mostly cloudy, with a low around 35.
Sunday
Cloudy, with a high near 58.
Sunday Night
Rain. Low around 49. Chance of precipitation is 80%.
Monday
Rain. High near 61. Chance of precipitation is 80%.
Monday Night
A chance of rain. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.
Tuesday
Mostly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton North NJ
 40.37°N 74.67°W (Elev. 256 ft)
Last Update:
4:09 pm EDT Mar 10, 2026
Forecast Valid:
2am EDT Mar 11, 2026-6pm EDT Mar 17, 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