National Weather Service

News Headlines

Transitioning to a New Format for the Area Forecast Discussion on January 6, 2026

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 Chill	22°F (-6°C)
Last update	2 Jan 3:53 pm EST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Princeton Junction NJ

Tonight
Low: 18 °F
Partly Cloudy
Saturday
High: 32 °F
Increasing
Clouds
Saturday Night
Low: 23 °F
Slight Chance
Snow
Sunday
High: 36 °F
Decreasing
Clouds
Sunday Night
Low: 16 °F
Partly Cloudy
Monday
High: 32 °F
Mostly Cloudy
Monday Night
Low: 25 °F
Mostly Cloudy
Tuesday
High: 44 °F
Mostly Cloudy
Tuesday Night
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.