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

30°F

-1°C

Humidity 79%
Wind Speed Calm
Barometer 29.99 in (1015.1 mb)
Dewpoint 24°F (-4°C)
Visibility 7.00 mi
Last update 6 Dec 10:53 pm EST
Extended Forecast for

Princeton NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Calm wind.

    Low: 23 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41. Calm wind becoming southwest around 5 mph.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 23. Light and variable wind becoming northwest 5 to 10 mph in the evening.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31. North wind 10 to 15 mph.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 12. North wind around 5 mph becoming calm.

    Low: 12 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Mostly cloudy, with a high near 45. Chance of precipitation is 40%.

    High: 45 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.

    Low: 32 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 23. Calm wind.
Sunday
Partly sunny, with a high near 41. Calm wind becoming southwest around 5 mph.
Sunday Night
Partly cloudy, with a low around 23. Light and variable wind becoming northwest 5 to 10 mph in the evening.
Monday
Mostly sunny, with a high near 31. North wind 10 to 15 mph.
Monday Night
Partly cloudy, with a low around 12. North wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
A chance of rain. Mostly cloudy, with a high near 45. Chance of precipitation is 40%.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.
Thursday
Partly sunny, with a high near 44.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Friday
A chance of rain and snow. Partly sunny, with a high near 41. Chance of precipitation is 30%.
Friday Night
A chance of snow. Partly cloudy, with a low around 20. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 31.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton NJ
 40.35°N 74.67°W (Elev. 190 ft)
Last Update:
7:59 pm EST Dec 6, 2025
Forecast Valid:
11pm EST Dec 6, 2025-6pm EST Dec 13, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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