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

30°F

-1°C

Humidity 88%
Wind Speed N 10 mph
Barometer 30.07 in (1017.8 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 16 Feb 6:53 am EST
Extended Forecast for

Monmouth Junction NJ

  • Washington's Birthday

    Washington's Birthday: Cloudy, then gradually becoming mostly sunny, with a high near 40. Northeast wind 5 to 10 mph.

    High: 40 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 26. Calm wind becoming southwest around 5 mph.

    Low: 26 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 47. Calm wind becoming southwest around 5 mph.

    High: 47 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 33. Calm wind.

    Low: 33 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Rain likely. Cloudy, with a high near 47. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 47 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am. Mostly cloudy, with a low around 37. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Chance Rain

  • Thursday

    Thursday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of rain after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 43. Chance of precipitation is 70%.

    High: 43 °F

    Rain Likely

Detailed Forecast

Washington's Birthday
Cloudy, then gradually becoming mostly sunny, with a high near 40. Northeast wind 5 to 10 mph.
Tonight
Mostly cloudy, with a low around 26. Calm wind becoming southwest around 5 mph.
Tuesday
Partly sunny, with a high near 47. Calm wind becoming southwest around 5 mph.
Tuesday Night
Increasing clouds, with a low around 33. Calm wind.
Wednesday
Rain likely. Cloudy, with a high near 47. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of rain before 1am. Mostly cloudy, with a low around 37. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly cloudy, with a high near 46.
Thursday Night
A chance of rain after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.
Friday
Rain likely. Mostly cloudy, with a high near 43. Chance of precipitation is 70%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 33. Chance of precipitation is 40%.
Saturday
A chance of rain. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 28.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monmouth Junction NJ
 40.38°N 74.55°W (Elev. 98 ft)
Last Update:
4:14 am EST Feb 16, 2026
Forecast Valid:
7am EST Feb 16, 2026-6pm EST Feb 22, 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