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

43°F

6°C

Humidity 76%
Wind Speed SW 3 mph
Barometer 29.97 in (1014.3 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 11 Nov 2:53 am EST
Extended Forecast for

Plainsboro NJ

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly clear, with a low around 36. West wind around 5 mph.

    Low: 36 °F

    Patchy Fog

  • Veterans Day

    Veterans Day: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 64. Southwest wind around 5 mph becoming calm in the afternoon.

    High: 64 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 45. Calm wind becoming east around 5 mph.

    Low: 45 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain likely before 10am, then rain and possibly a thunderstorm between 10am and 1pm, then rain after 1pm. High near 63. East wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 63 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly after 1am. Mostly cloudy, with a low around 37. Northwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Rain Likely

  • Friday

    Friday: Rain likely, mainly before 1pm. Mostly cloudy, with a high near 48. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Rain Likely

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly clear, with a low around 36. West wind around 5 mph.
Veterans Day
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 64. Southwest wind around 5 mph becoming calm in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 45. Calm wind becoming east around 5 mph.
Thursday
Rain likely before 10am, then rain and possibly a thunderstorm between 10am and 1pm, then rain after 1pm. High near 63. East wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 37. Northwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain likely, mainly before 1pm. Mostly cloudy, with a high near 48. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Mostly cloudy, with a low around 30.
Saturday
Partly sunny, with a high near 48.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Mostly clear, with a low around 29.
Monday
Sunny, with a high near 53.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Mostly sunny, with a high near 53.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Plainsboro NJ
 40.33°N 74.56°W (Elev. 98 ft)
Last Update:
1:23 am EST Nov 11, 2026
Forecast Valid:
3am EST Nov 11, 2026-6pm EST Nov 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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