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

60°F

16°C

Humidity 41%
Wind Speed W 8 mph
Barometer 29.88 in (1011.4 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 1 May 1:53 pm EDT
Extended Forecast for

Princeton North NJ

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 65. Southwest wind around 10 mph.

    High: 65 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers, mainly after midnight. Increasing clouds, with a low around 46. Southwest wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 61. North wind 5 to 10 mph.

    High: 61 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Cloudy, then gradually becoming partly cloudy, with a low around 40. Northeast wind 5 to 10 mph becoming northwest after midnight.

    Low: 40 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 60. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 60 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 65. Southwest wind around 10 mph.
Tonight
A chance of showers, mainly after midnight. Increasing clouds, with a low around 46. Southwest wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Mostly cloudy, with a high near 61. North wind 5 to 10 mph.
Saturday Night
Cloudy, then gradually becoming partly cloudy, with a low around 40. Northeast wind 5 to 10 mph becoming northwest after midnight.
Sunday
Mostly sunny, with a high near 60. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Wednesday
Showers likely. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Thursday
A chance of showers. Partly sunny, with a high near 66. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton North NJ
 40.37°N 74.67°W (Elev. 256 ft)
Last Update:
1:43 pm EDT May 1, 2026
Forecast Valid:
2pm EDT May 1, 2026-6pm EDT May 7, 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