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

27°F

-3°C

Humidity 81%
Wind Speed Calm
Barometer 30.03 in (1016.5 mb)
Dewpoint 22°F (-6°C)
Visibility 8.00 mi
Last update 15 Feb 4:53 am EST
Extended Forecast for

Plainsboro NJ

  • Today

    Today: Mostly cloudy, with a high near 41. Calm wind becoming east around 5 mph in the afternoon.

    High: 41 °F

    Mostly Cloudy

  • Tonight

    Tonight: Snow before 1am, then snow likely, possibly mixed with rain between 1am and 2am, then a chance of snow after 2am. Low around 29. Northeast wind around 5 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 29 °F

    Snow then
    Rain/Snow

  • Washington's Birthday

    Washington's Birthday: Mostly cloudy, with a high near 40. Northeast wind around 5 mph becoming calm in the afternoon.

    High: 40 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 46. Calm wind becoming southwest around 5 mph.

    High: 46 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Cloudy, with a high near 44. Chance of precipitation is 50%.

    High: 44 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 50%.

    Low: 35 °F

    Chance Rain

  • Thursday

    Thursday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly cloudy, with a high near 41. Calm wind becoming east around 5 mph in the afternoon.
Tonight
Snow before 1am, then snow likely, possibly mixed with rain between 1am and 2am, then a chance of snow after 2am. Low around 29. Northeast wind around 5 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Washington's Birthday
Mostly cloudy, with a high near 40. Northeast wind around 5 mph becoming calm in the afternoon.
Monday Night
Mostly cloudy, with a low around 28. Calm wind.
Tuesday
Partly sunny, with a high near 46. Calm wind becoming southwest around 5 mph.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A chance of rain. Cloudy, with a high near 44. Chance of precipitation is 50%.
Wednesday Night
A chance of rain before 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 50%.
Thursday
Mostly cloudy, with a high near 45.
Thursday Night
A chance of rain after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Friday
Rain likely. Mostly cloudy, with a high near 47. Chance of precipitation is 70%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 33. Chance of precipitation is 40%.
Saturday
A chance of rain. Partly sunny, with a high near 45. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Plainsboro NJ
 40.33°N 74.56°W (Elev. 98 ft)
Last Update:
4:14 am EST Feb 15, 2026
Forecast Valid:
5am EST Feb 15, 2026-6pm EST Feb 21, 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