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 40%
Wind Speed W 5 mph
Barometer 29.85 in (1010.2 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 26 Feb 3:53 pm EST
Extended Forecast for

Princeton NJ

  • This Afternoon

    This Afternoon: A slight chance of snow. Mostly cloudy, with a high near 46. Calm wind. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Partly cloudy, with a low around 21. Calm wind.

    Low: 21 °F

    Partly Cloudy

  • Friday

    Friday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 45. Calm wind.

    High: 45 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27. Calm wind.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 51. Calm wind becoming southwest around 5 mph.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

  • Monday

    Monday: A chance of snow. Mostly cloudy, with a high near 29. Chance of precipitation is 40%.

    High: 29 °F

    Chance Snow

Detailed Forecast

This Afternoon
A slight chance of snow. Mostly cloudy, with a high near 46. Calm wind. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 21. Calm wind.
Friday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 45. Calm wind.
Friday Night
Mostly clear, with a low around 27. Calm wind.
Saturday
Sunny, with a high near 51. Calm wind becoming southwest around 5 mph.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Partly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 17.
Monday
A chance of snow. Mostly cloudy, with a high near 29. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Partly sunny, with a high near 38.
Tuesday Night
A chance of rain or freezing rain. Cloudy, with a low around 28. Chance of precipitation is 50%.
Wednesday
A chance of rain. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Thursday
A chance of rain. Mostly cloudy, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton NJ
 40.35°N 74.67°W (Elev. 190 ft)
Last Update:
4:11 pm EST Feb 26, 2026
Forecast Valid:
4pm EST Feb 26, 2026-6pm EST Mar 5, 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