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

44°F

7°C

Humidity 85%
Wind Speed E 15 G 24 mph
Barometer 30.39 in (1028.5 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 2 Apr 9:53 am EDT
Extended Forecast for

2 Miles SSE Princeton Junction NJ

  • Today

    Today: Mostly cloudy, with a high near 47. East wind 10 to 15 mph.

    High: 47 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of showers between 11pm and 1am. Cloudy, with a low around 40. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 40 °F

    Slight Chance
    Showers

  • Friday

    Friday: Patchy fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 72. East wind 5 to 15 mph becoming southwest in the afternoon.

    High: 72 °F

    Patchy Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 59. Southwest wind around 5 mph.

    Low: 59 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 77. West wind 5 to 10 mph becoming east in the afternoon. Chance of precipitation is 30%.

    High: 77 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 40%.

    Low: 52 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 8am. High near 70. Chance of precipitation is 90%.

    High: 70 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely before 8pm. Partly cloudy, with a low around 39. Chance of precipitation is 60%.

    Low: 39 °F

    Showers
    Likely then
    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 47. East wind 10 to 15 mph.
Tonight
A slight chance of showers between 11pm and 1am. Cloudy, with a low around 40. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Friday
Patchy fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 72. East wind 5 to 15 mph becoming southwest in the afternoon.
Friday Night
Mostly cloudy, with a low around 59. Southwest wind around 5 mph.
Saturday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 77. West wind 5 to 10 mph becoming east in the afternoon. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 40%.
Sunday
Showers, mainly after 8am. High near 70. Chance of precipitation is 90%.
Sunday Night
Showers likely before 8pm. Partly cloudy, with a low around 39. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Mostly sunny, with a high near 55.
Tuesday Night
Mostly clear, with a low around 29.
Wednesday
Sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Princeton Junction NJ
 40.29°N 74.6°W (Elev. 98 ft)
Last Update:
4:11 am EDT Apr 2, 2026
Forecast Valid:
10am EDT Apr 2, 2026-6pm EDT Apr 8, 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