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.

Mostly Cloudy

78°F

26°C

Humidity 42%
Wind Speed W 6 mph
Barometer 30.05 in (1016.9 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 1 Apr 5:53 pm EDT
Extended Forecast for

Monmouth Junction NJ

  • Tonight

    Tonight: Showers and thunderstorms before 3am, then a chance of showers between 3am and 5am. Low around 46. North wind 10 to 15 mph becoming east after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Showers

  • Thursday

    Thursday: A slight chance of showers between 8am and 2pm. Cloudy, with a high near 50. East wind 10 to 15 mph. Chance of precipitation is 20%.

    High: 50 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers between 8pm and 2am. Cloudy, with a low around 42. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 42 °F

    Slight Chance
    Showers

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny, with a high near 77. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 77 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 59. Southwest wind 5 to 10 mph.

    Low: 59 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of showers after 2pm. Mostly sunny, with a high near 81. Chance of precipitation is 20%.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers after 2am. Partly cloudy, with a low around 57. Chance of precipitation is 30%.

    Low: 57 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 8am. High near 71. Chance of precipitation is 90%.

    High: 71 °F

    Showers

  • Sunday Night

    Sunday Night: Showers, mainly before 8pm. Low around 40. Chance of precipitation is 80%.

    Low: 40 °F

    Showers then
    Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms before 3am, then a chance of showers between 3am and 5am. Low around 46. North wind 10 to 15 mph becoming east after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A slight chance of showers between 8am and 2pm. Cloudy, with a high near 50. East wind 10 to 15 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers between 8pm and 2am. Cloudy, with a low around 42. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 77. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 59. Southwest wind 5 to 10 mph.
Saturday
A slight chance of showers after 2pm. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
Saturday Night
A chance of showers after 2am. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Sunday
Showers, mainly after 8am. High near 71. Chance of precipitation is 90%.
Sunday Night
Showers, mainly before 8pm. Low around 40. Chance of precipitation is 80%.
Monday
Mostly sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Mostly sunny, with a high near 54.
Tuesday Night
Partly cloudy, with a low around 32.
Wednesday
Sunny, with a high near 52.
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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:
5:59 pm EDT Apr 1, 2026
Forecast Valid:
6pm EDT Apr 1, 2026-6pm EDT Apr 8, 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