Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Overcast

29°F

-2°C

Humidity 54%
Wind Speed W 7 mph
Barometer 29.77 in (1007.8 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 2 Jan 3:53 pm EST
Extended Forecast for

Princeton Junction NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 18. West wind around 5 mph.

    Low: 18 °F

    Partly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a high near 32. Calm wind becoming west around 5 mph.

    High: 32 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A slight chance of snow.  Cloudy, with a low around 23. Calm wind.  Chance of precipitation is 20%.

    Low: 23 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 36. Light northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 36 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 16. Northwest wind around 5 mph.

    Low: 16 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 32.

    High: 32 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 44.

    High: 44 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 18. West wind around 5 mph.
Saturday
Increasing clouds, with a high near 32. Calm wind becoming west around 5 mph.
Saturday Night
A slight chance of snow. Cloudy, with a low around 23. Calm wind. Chance of precipitation is 20%.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 36. Light northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 16. Northwest wind around 5 mph.
Monday
Mostly cloudy, with a high near 32.
Monday Night
Mostly cloudy, with a low around 25.
Tuesday
Mostly cloudy, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
Mostly cloudy, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Partly sunny, with a high near 47.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Friday
A chance of rain. Mostly cloudy, with a high near 51. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton Junction NJ
 40.32°N 74.62°W (Elev. 85 ft)
4:11 am EST Jan 2, 2026
4pm EST Jan 2, 2026-6pm EST Jan 9, 2026
 
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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