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.

A Few Clouds

31°F

-1°C

Humidity 52%
Wind Speed W 8 mph
Barometer 30.14 in (1020.3 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 17 Mar 9:53 pm EDT
Extended Forecast for

Princeton NJ

  • Tonight

    Tonight: Scattered flurries before 11pm. Mostly clear, with a low around 23. Northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Scattered
    Flurries

  • Wednesday

    Wednesday: Partly sunny, with a high near 41. Northwest wind around 5 mph becoming calm.

    High: 41 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 50. South wind around 5 mph.

    High: 50 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A slight chance of rain after 2am. Cloudy, with a low around 32. South wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 32 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Mostly cloudy, with a high near 55.

    High: 55 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A chance of rain after 2am. Mostly cloudy, with a low around 38. Chance of precipitation is 30%.

    Low: 38 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday

    Saturday: A chance of rain before 8am. Partly sunny, with a high near 55. Chance of precipitation is 30%.

    High: 55 °F

    Chance Rain
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: A chance of rain after 2am. Mostly cloudy, with a low around 39. Chance of precipitation is 30%.

    Low: 39 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Scattered flurries before 11pm. Mostly clear, with a low around 23. Northwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 41. Northwest wind around 5 mph becoming calm.
Wednesday Night
Partly cloudy, with a low around 25. Calm wind.
Thursday
Partly sunny, with a high near 50. South wind around 5 mph.
Thursday Night
A slight chance of rain after 2am. Cloudy, with a low around 32. South wind around 5 mph becoming calm. Chance of precipitation is 20%.
Friday
Mostly cloudy, with a high near 55.
Friday Night
A chance of rain after 2am. Mostly cloudy, with a low around 38. Chance of precipitation is 30%.
Saturday
A chance of rain before 8am. Partly sunny, with a high near 55. Chance of precipitation is 30%.
Saturday Night
A chance of rain after 2am. Mostly cloudy, with a low around 39. Chance of precipitation is 30%.
Sunday
A chance of rain before 8am. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Monday
Sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 27.
Tuesday
Mostly sunny, with a high near 46.
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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:
5:56 pm EDT Mar 17, 2026
Forecast Valid:
10pm EDT Mar 17, 2026-6pm EDT Mar 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation