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

44°F

7°C

Humidity 83%
Wind Speed NW 5 mph
Barometer 29.94 in (1013.1 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 1 May 6:53 am EDT
Extended Forecast for

Monmouth Junction NJ

  • Today

    Today: Increasing clouds, with a high near 65. West wind around 5 mph.

    High: 65 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A chance of showers, mainly after 11pm. Increasing clouds, with a low around 46. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers before 8am, then a slight chance of showers after 2pm. Mostly cloudy, with a high near 62. West wind around 5 mph. Chance of precipitation is 20%.

    High: 62 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers, mainly between 8pm and 2am. Mostly cloudy, with a low around 41. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 61. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 65. West wind around 5 mph.
Tonight
A chance of showers, mainly after 11pm. Increasing clouds, with a low around 46. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A slight chance of showers before 8am, then a slight chance of showers after 2pm. Mostly cloudy, with a high near 62. West wind around 5 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers, mainly between 8pm and 2am. Mostly cloudy, with a low around 41. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Sunny, with a high near 61. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Wednesday
Showers likely. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Thursday
A chance of showers. Partly sunny, with a high near 67. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Monmouth Junction NJ
 40.38°N 74.55°W (Elev. 98 ft)
Last Update:
4:08 am EDT May 1, 2026
Forecast Valid:
7am EDT May 1, 2026-6pm EDT May 7, 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