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.

Fair

43°F

6°C

Humidity 53%
Wind Speed SW 7 mph
Barometer 30.16 in (1021.0 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 19 Mar 6:53 pm EDT
Extended Forecast for

Monmouth Junction NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 32. Southwest wind around 5 mph becoming calm.

    Low: 32 °F

    Partly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 61. Light southwest wind becoming south 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 61 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 44. South wind 5 to 15 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 44 °F

    Showers
    Likely

  • Saturday

    Saturday: Sunny, with a high near 64. Northwest wind around 5 mph.

    High: 64 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 41. Northwest wind around 5 mph becoming calm.

    Low: 41 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.

    Low: 45 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely before 8am. Mostly sunny, with a high near 58. Chance of precipitation is 60%.

    High: 58 °F

    Showers
    Likely then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 32. Southwest wind around 5 mph becoming calm.
Friday
Increasing clouds, with a high near 61. Light southwest wind becoming south 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Friday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 44. South wind 5 to 15 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Sunny, with a high near 64. Northwest wind around 5 mph.
Saturday Night
Mostly cloudy, with a low around 41. Northwest wind around 5 mph becoming calm.
Sunday
Partly sunny, with a high near 67.
Sunday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Monday
Showers likely before 8am. Mostly sunny, with a high near 58. Chance of precipitation is 60%.
Monday Night
Mostly clear, with a low around 29.
Tuesday
Sunny, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly cloudy, with a high near 52.
Wednesday Night
Mostly cloudy, with a low around 33.
Thursday
Partly sunny, with a high near 56.
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:
4:10 pm EDT Mar 19, 2026
Forecast Valid:
6pm EDT Mar 19, 2026-6pm EDT Mar 26, 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