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.

Overcast

29°F

-2°C

Humidity 92%
Wind Speed SW 5 mph
Barometer 30.17 in (1021.1 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 28 Dec 11:53 am EST
Extended Forecast for

2 Miles SSE Princeton Junction NJ

  • This Afternoon

    This Afternoon: A slight chance of rain after 4pm. Cloudy, with a steady temperature around 35. Calm wind. Chance of precipitation is 20%.

    High: 35 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Rain likely, mainly before midnight. Cloudy, with a temperature rising to around 42 by 5am. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 34 °F⇑

    Rain Likely

  • Monday

    Monday: Showers, mainly between 7am and 1pm. High near 55. Southwest wind 10 to 15 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 55 °F

    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 25. West wind around 15 mph, with gusts as high as 30 mph.

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 33. Breezy, with a west wind 15 to 20 mph, with gusts as high as 40 mph.

    High: 33 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: A chance of snow after 1pm. Partly sunny, with a high near 34. Chance of precipitation is 30%.

    High: 34 °F

    Partly Sunny
    then Chance
    Snow

Detailed Forecast

This Afternoon
A slight chance of rain after 4pm. Cloudy, with a steady temperature around 35. Calm wind. Chance of precipitation is 20%.
Tonight
Rain likely, mainly before midnight. Cloudy, with a temperature rising to around 42 by 5am. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers, mainly between 7am and 1pm. High near 55. Southwest wind 10 to 15 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Partly cloudy, with a low around 25. West wind around 15 mph, with gusts as high as 30 mph.
Tuesday
Partly sunny, with a high near 33. Breezy, with a west wind 15 to 20 mph, with gusts as high as 40 mph.
Tuesday Night
Mostly cloudy, with a low around 23.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 24.
New Year's Day
A chance of snow after 1pm. Partly sunny, with a high near 34. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 18.
Friday
Mostly sunny, with a high near 30.
Friday Night
Partly cloudy, with a low around 17.
Saturday
Mostly sunny, with a high near 36.
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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:
4:10 am EST Dec 28, 2025
Forecast Valid:
12pm EST Dec 28, 2025-6pm EST Jan 3, 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