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.

Overcast

40°F

4°C

Humidity 86%
Wind Speed N 12 mph
Barometer 29.69 in (1005.0 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 13 Nov 4:53 pm EST
Extended Forecast for

Plainsboro NJ

  • This Afternoon

    This Afternoon: A chance of rain. Cloudy, with a high near 42. North wind around 5 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 42 °F

    Chance Rain

  • Tonight

    Tonight: Rain likely, mainly before 8pm. Mostly cloudy, with a low around 30. Northwest wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 30 °F

    Rain Likely
    then Mostly
    Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 47. Northwest wind 5 to 10 mph.

    High: 47 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31. West wind around 5 mph.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 51. Northwest wind 5 to 10 mph.

    High: 51 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of rain. Cloudy, with a high near 42. North wind around 5 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain likely, mainly before 8pm. Mostly cloudy, with a low around 30. Northwest wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Partly sunny, with a high near 47. Northwest wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 31. West wind around 5 mph.
Sunday
Mostly sunny, with a high near 51. Northwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 29.
Monday
Sunny, with a high near 54.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 29.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Clear, with a low around 30.
Thursday
Sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 31.
Friday
Mostly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Plainsboro NJ
 40.34°N 74.59°W (Elev. 89 ft)
Last Update:
4:08 pm EST Nov 13, 2026
Forecast Valid:
5pm EST Nov 13, 2026-6pm EST Nov 20, 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