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

41°F

5°C

Humidity 93%
Wind Speed E 12 mph
Barometer 30.42 in (1029.7 mb)
Dewpoint 39°F (4°C)
Visibility 3.00 mi
Wind Chill34°F (1°C)
Last update 2 Apr 6:53 pm EDT
Extended Forecast for

Monmouth Junction NJ

  • Tonight

    Tonight: Patchy drizzle before 9pm, then patchy drizzle with a chance of showers between 9pm and 2am, then areas of drizzle after 2am. Patchy fog. Otherwise, cloudy, with a low around 40. East wind 5 to 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.

    Low: 40 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Widespread dense fog before noon. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 76. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 76 °F

    Dense Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 58. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 76. Light and variable wind becoming east 5 to 10 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 50. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers. High near 72. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 72 °F

    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy drizzle before 9pm, then patchy drizzle with a chance of showers between 9pm and 2am, then areas of drizzle after 2am. Patchy fog. Otherwise, cloudy, with a low around 40. East wind 5 to 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.
Friday
Widespread dense fog before noon. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 76. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 58. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 76. Light and variable wind becoming east 5 to 10 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 50. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Showers. High near 72. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Mostly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
A chance of showers after 2pm. Mostly sunny, with a high near 52. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly clear, with a low around 30. Chance of precipitation is 30%.
Wednesday
Sunny, with a high near 52.
Wednesday Night
Mostly clear, with a low around 32.
Thursday
Sunny, with a high near 62.
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:
5:51 pm EDT Apr 2, 2026
Forecast Valid:
7pm EDT Apr 2, 2026-6pm EDT Apr 9, 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