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

44°F

7°C

Humidity 85%
Wind Speed E 17 G 23 mph
Barometer 30.42 in (1029.7 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 2 Apr 1:53 pm EDT
Extended Forecast for

Princeton North NJ

  • This Afternoon

    This Afternoon: Patchy fog. Otherwise, cloudy, with a high near 48. East wind around 10 mph, with gusts as high as 20 mph.

    High: 48 °F

    Patchy Fog

  • Tonight

    Tonight: A chance of showers, mainly before midnight. Patchy fog. Otherwise, cloudy, with a low around 40. East 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.

    Low: 40 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Widespread dense fog before noon. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 76. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 76 °F

    Dense Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59. Southwest wind around 5 mph.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 77. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 8am. High near 70. Chance of precipitation is 90%.

    High: 70 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely before 8pm. Partly cloudy, with a low around 40. Chance of precipitation is 60%.

    Low: 40 °F

    Showers
    Likely then
    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Patchy fog. Otherwise, cloudy, with a high near 48. East wind around 10 mph, with gusts as high as 20 mph.
Tonight
A chance of showers, mainly before midnight. Patchy fog. Otherwise, cloudy, with a low around 40. East 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.
Friday
Widespread dense fog before noon. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 76. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Partly cloudy, with a low around 59. Southwest wind around 5 mph.
Saturday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 77. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers, mainly after 8am. High near 70. Chance of precipitation is 90%.
Sunday Night
Showers likely before 8pm. Partly cloudy, with a low around 40. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
Mostly sunny, with a high near 55.
Tuesday Night
Mostly clear, with a low around 30.
Wednesday
Sunny, with a high near 51.
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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:
1:45 pm EDT Apr 2, 2026
Forecast Valid:
2pm EDT Apr 2, 2026-6pm EDT Apr 8, 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