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

66°F

19°C

Humidity 73%
Wind Speed SW 3 mph
Barometer 30.13 in (1019.7 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 3 Apr 6:53 pm EDT
Extended Forecast for

Monmouth Junction NJ

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 56. Southwest wind 5 to 10 mph.

    Low: 56 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: A chance of showers, mainly after 2pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 72. Light and variable wind becoming east 5 to 10 mph in the morning. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 72 °F

    Patchy Fog
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers. Cloudy, with a low around 47. East wind 5 to 15 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 47 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers. High near 70. West wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 70 °F

    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. West wind around 10 mph.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 56. Southwest wind 5 to 10 mph.
Saturday
A chance of showers, mainly after 2pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 72. Light and variable wind becoming east 5 to 10 mph in the morning. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A chance of showers. Cloudy, with a low around 47. East wind 5 to 15 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Showers. High near 70. West wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Partly cloudy, with a low around 40. West wind around 10 mph.
Monday
Sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Mostly sunny, with a high near 53.
Tuesday Night
Mostly clear, with a low around 28.
Wednesday
Sunny, with a high near 53.
Wednesday Night
Mostly clear, with a low around 33.
Thursday
Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 43.
Friday
Mostly sunny, with a high near 71.
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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:
6:46 pm EDT Apr 3, 2026
Forecast Valid:
7pm EDT Apr 3, 2026-6pm EDT Apr 10, 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