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.

Fog/Mist

36°F

2°C

Humidity 100%
Wind Speed Calm
Barometer 30.26 in (1024.3 mb)
Dewpoint 36°F (2°C)
Visibility 1.00 mi
Last update 7 Mar 6:53 am EST
Extended Forecast for

Monmouth Junction NJ

  • Today

    Today: Patchy fog before noon. Otherwise, cloudy, with a high near 50. Calm wind becoming southwest around 5 mph.

    High: 50 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Showers likely, mainly after 1am. Mostly cloudy, with a low around 49. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 1pm. Mostly cloudy, with a high near 68. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 68 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 39. West wind around 5 mph becoming calm after midnight.

    Low: 39 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 69. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers. Cloudy, with a high near 75. Chance of precipitation is 30%.

    High: 75 °F

    Chance
    Showers

Detailed Forecast

Today
Patchy fog before noon. Otherwise, cloudy, with a high near 50. Calm wind becoming southwest around 5 mph.
Tonight
Showers likely, mainly after 1am. Mostly cloudy, with a low around 49. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A chance of showers before 1pm. Mostly cloudy, with a high near 68. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Partly cloudy, with a low around 39. West wind around 5 mph becoming calm after midnight.
Monday
Sunny, with a high near 69. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly cloudy, with a low around 52.
Wednesday
A chance of showers. Cloudy, with a high near 75. Chance of precipitation is 30%.
Wednesday Night
Showers likely, mainly after 1am. Cloudy, with a low around 50. Chance of precipitation is 60%.
Thursday
A chance of showers. Cloudy, with a high near 62. Breezy. Chance of precipitation is 50%.
Thursday Night
Mostly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monmouth Junction NJ
 40.38°N 74.55°W (Elev. 98 ft)
Last Update:
4:09 am EST Mar 7, 2026
Forecast Valid:
7am EST Mar 7, 2026-6pm EDT Mar 13, 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