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 68%
Wind Speed Calm
Barometer 29.90 in (1011.9 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 15 Nov 7:53 am EST
Extended Forecast for

Plainsboro NJ

  • Today

    Today: Increasing clouds, with a high near 57. Calm wind becoming south around 5 mph.

    High: 57 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Showers, mainly before 10pm. Low around 46. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Showers then
    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 58. Breezy, with a west wind 10 to 20 mph, with gusts as high as 35 mph.

    High: 58 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 33. West wind 10 to 15 mph.

    Low: 33 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 47. West wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 47 °F

    Mostly Sunny

  • Monday Night

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

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain before 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.

    Low: 31 °F

    Chance Rain

  • Wednesday

    Wednesday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 57. Calm wind becoming south around 5 mph.
Tonight
Showers, mainly before 10pm. Low around 46. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Mostly sunny, with a high near 58. Breezy, with a west wind 10 to 20 mph, with gusts as high as 35 mph.
Sunday Night
Partly cloudy, with a low around 33. West wind 10 to 15 mph.
Monday
Mostly sunny, with a high near 47. West wind 10 to 15 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 29.
Tuesday
Mostly sunny, with a high near 49.
Tuesday Night
A chance of rain before 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Partly sunny, with a high near 53.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 38. Chance of precipitation is 50%.
Friday
A chance of rain. Mostly cloudy, with a high near 59. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Plainsboro NJ
 40.34°N 74.59°W (Elev. 89 ft)
Last Update:
4:09 am EST Nov 15, 2025
Forecast Valid:
8am EST Nov 15, 2025-6pm EST Nov 21, 2025
 
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