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

28°F

-2°C

Humidity 47%
Wind Speed NW 15 G 28 mph
Barometer 29.92 in (1012.8 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 24 Feb 2:53 pm EST
Extended Forecast for

Princeton Junction NJ

  • Tonight

    Tonight: Snow likely, mainly after 4am. Increasing clouds, with a low around 17. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 17 °F

    Mostly Clear
    then Snow
    Likely

  • Wednesday

    Wednesday: Snow, mainly before 8am. High near 44. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Snow then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29. Southwest wind around 5 mph.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of snow, mainly after 1pm. Mostly cloudy, with a high near 40. West wind around 5 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 26. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.

    Low: 26 °F

    Chance Snow

  • Friday

    Friday: A slight chance of snow and freezing rain before 1pm. Partly sunny, with a high near 41. Chance of precipitation is 20%.

    High: 41 °F

    Slight Chance
    Wintry Mix

  • Friday Night

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

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 30 °F

    Partly Cloudy

Detailed Forecast

Tonight
Snow likely, mainly after 4am. Increasing clouds, with a low around 17. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.
Wednesday
Snow, mainly before 8am. High near 44. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Wednesday Night
Partly cloudy, with a low around 29. Southwest wind around 5 mph.
Thursday
A chance of snow, mainly after 1pm. Mostly cloudy, with a high near 40. West wind around 5 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 26. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.
Friday
A slight chance of snow and freezing rain before 1pm. Partly sunny, with a high near 41. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Mostly cloudy, with a high near 44.
Sunday Night
Mostly cloudy, with a low around 20.
Monday
A chance of snow. Mostly cloudy, with a high near 31. Chance of precipitation is 40%.
Monday Night
A chance of snow. Mostly cloudy, with a low around 19. Chance of precipitation is 30%.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton Junction NJ
 40.32°N 74.62°W (Elev. 85 ft)
Last Update:
2:08 pm EST Feb 24, 2026
Forecast Valid:
3pm EST Feb 24, 2026-6pm EST Mar 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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