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

58°F

14°C

Humidity 41%
Wind Speed NW 16 G 26 mph
Barometer 29.87 in (1010.9 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 9 Nov 2:53 pm EST
Extended Forecast for

Plainsboro NJ

  • Tonight

    Tonight: Increasing clouds, with a low around 36. West wind around 5 mph.

    Low: 36 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 64. Southwest wind 5 to 15 mph.

    High: 64 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 37. West wind around 5 mph becoming calm.

    Low: 37 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 63. Northwest wind around 5 mph becoming calm.

    High: 63 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain likely, mainly after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Chance Rain
    then Rain
    Likely

  • Thursday Night

    Thursday Night: Rain. Low around 36. Chance of precipitation is 80%.

    Low: 36 °F

    Rain

  • Friday

    Friday: Rain likely, mainly before 1pm. Mostly cloudy, with a high near 47. Chance of precipitation is 70%.

    High: 47 °F

    Rain Likely

  • Friday Night

    Friday Night: A chance of rain before 1am. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.

    Low: 29 °F

    Chance Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 36. West wind around 5 mph.
Tuesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 64. Southwest wind 5 to 15 mph.
Tuesday Night
Mostly clear, with a low around 37. West wind around 5 mph becoming calm.
Veterans Day
Mostly sunny, with a high near 63. Northwest wind around 5 mph becoming calm.
Wednesday Night
Mostly cloudy, with a low around 38. Calm wind.
Thursday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain. Low around 36. Chance of precipitation is 80%.
Friday
Rain likely, mainly before 1pm. Mostly cloudy, with a high near 47. Chance of precipitation is 70%.
Friday Night
A chance of rain before 1am. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 48.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Plainsboro NJ
 40.32°N 74.59°W (Elev. 85 ft)
Last Update:
2:00 pm EST Nov 9, 2026
Forecast Valid:
3pm EST Nov 9, 2026-6pm EST Nov 16, 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