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

58°F

14°C

Humidity 53%
Wind Speed SW 15 G 23 mph
Barometer 29.95 in (1013.5 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 4 May 8:53 am EDT
Extended Forecast for

Monmouth Junction NJ

  • Today

    Today: Sunny, with a high near 74. Southwest wind 10 to 15 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. South wind 5 to 10 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain. High near 71. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 71 °F

    Rain Likely
    then Rain

  • Wednesday Night

    Wednesday Night: Rain, mainly before 2am. Low around 50. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Rain

  • Thursday

    Thursday: A chance of rain before 8am, then showers likely, mainly after 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.

    High: 62 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 74. Southwest wind 10 to 15 mph.
Tonight
Mostly clear, with a low around 55. South wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 84. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Rain. High near 71. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain, mainly before 2am. Low around 50. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A chance of rain before 8am, then showers likely, mainly after 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.
Thursday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 64.
Friday Night
Partly cloudy, with a low around 45.
Saturday
A chance of showers. Mostly sunny, with a high near 67. Chance of precipitation is 30%.
Saturday Night
A chance of showers. Partly cloudy, with a low around 45. Chance of precipitation is 30%.
Sunday
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:
4:08 am EDT May 4, 2026
Forecast Valid:
9am EDT May 4, 2026-6pm EDT May 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