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.

Mostly Cloudy

31°F

-1°C

Humidity 43%
Wind Speed W 15 G 24 mph
Barometer 29.51 in (998.9 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 15 Jan 2:53 pm EST
Extended Forecast for

2 Miles SSE Princeton Junction NJ

  • Tonight

    Tonight: Mostly cloudy, with a low around 20. Breezy, with a west wind 15 to 20 mph.

    Low: 20 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Friday

    Friday: Sunny, with a high near 35. West wind 10 to 15 mph.

    High: 35 °F

    Sunny

  • Friday Night

    Friday Night: A slight chance of snow after 1am. Mostly cloudy, with a low around 25. South wind around 5 mph. Chance of precipitation is 20%.

    Low: 25 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A chance of snow before 1pm, then a chance of rain and snow between 1pm and 4pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 42. South wind around 5 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 42 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A slight chance of rain before 1am, then a slight chance of snow. Mostly cloudy, with a low around 26. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.

    Low: 26 °F

    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of snow. Mostly cloudy, with a high near 34. Chance of precipitation is 30%.

    High: 34 °F

    Chance Snow

  • Sunday Night

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

    Low: 17 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 30.

    High: 30 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13.

    Low: 13 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 20. Breezy, with a west wind 15 to 20 mph.
Friday
Sunny, with a high near 35. West wind 10 to 15 mph.
Friday Night
A slight chance of snow after 1am. Mostly cloudy, with a low around 25. South wind around 5 mph. Chance of precipitation is 20%.
Saturday
A chance of snow before 1pm, then a chance of rain and snow between 1pm and 4pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 42. South wind around 5 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Saturday Night
A slight chance of rain before 1am, then a slight chance of snow. Mostly cloudy, with a low around 26. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.
Sunday
A chance of snow. Mostly cloudy, with a high near 34. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 17.
M.L.King Day
Sunny, with a high near 30.
Monday Night
Partly cloudy, with a low around 13.
Tuesday
Sunny, with a high near 23.
Tuesday Night
Mostly clear, with a low around 8.
Wednesday
Mostly sunny, with a high near 28.
Wednesday Night
Partly cloudy, with a low around 17.
Thursday
Mostly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Princeton Junction NJ
 40.29°N 74.6°W (Elev. 98 ft)
Last Update:
4:14 am EST Jan 15, 2026
Forecast Valid:
3pm EST Jan 15, 2026-6pm EST Jan 22, 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