National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fog/Mist

38°F

3°C

Humidity 89%
Wind Speed E 5 mph
Barometer 29.80 in (1008.7 mb)
Dewpoint 35°F (2°C)
Visibility 3.00 mi
Wind Chill34°F (1°C)
Last update 18 Feb 11:53 am EST
Extended Forecast for

Princeton Junction NJ

  • This Afternoon

    This Afternoon: A chance of light rain, mainly after 3pm. Patchy fog. Otherwise, cloudy, with a high near 45. North wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Chance Light
    Rain and
    Patchy Fog

  • Tonight

    Tonight: Light rain likely, mainly between 7pm and 11pm. Patchy fog. Otherwise, cloudy, with a low around 35. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Light Rain
    Likely and
    Patchy Fog

  • Thursday

    Thursday: A slight chance of light rain before 10am, then a chance of light rain after 1pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 44. East wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Chance Light
    Rain and
    Patchy Fog

  • Thursday Night

    Thursday Night: Rain likely with a chance of light rain before 7pm, then rain, mainly after 7pm. Low around 35. East wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 35 °F

    Rain

  • Friday

    Friday: Rain. High near 44. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain

  • Friday Night

    Friday Night: A chance of rain before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of rain and snow after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.

    Low: 32 °F

    Partly Cloudy
    then Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of rain and snow before 1pm, then snow likely. Cloudy, with a high near 38. Chance of precipitation is 60%.

    High: 38 °F

    Rain/Snow
    Likely

Detailed Forecast

This Afternoon
A chance of light rain, mainly after 3pm. Patchy fog. Otherwise, cloudy, with a high near 45. North wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Light rain likely, mainly between 7pm and 11pm. Patchy fog. Otherwise, cloudy, with a low around 35. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A slight chance of light rain before 10am, then a chance of light rain after 1pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 44. East wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain likely with a chance of light rain before 7pm, then rain, mainly after 7pm. Low around 35. East wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 44. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A chance of rain before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Partly sunny, with a high near 49.
Saturday Night
A chance of rain and snow after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.
Sunday
A chance of rain and snow before 1pm, then snow likely. Cloudy, with a high near 38. Chance of precipitation is 60%.
Sunday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 60%.
Monday
A chance of snow. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Sunny, with a high near 33.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton Junction NJ
 40.32°N 74.62°W (Elev. 85 ft)
Last Update:
12:34 pm EST Feb 18, 2026
Forecast Valid:
12pm EST Feb 18, 2026-6pm EST Feb 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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