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

58°F

14°C

Humidity 46%
Wind Speed SW 9 G 16 mph
Barometer 29.90 in (1011.9 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 1 May 12:53 pm EDT
Extended Forecast for

2 Miles SSE Princeton Junction NJ

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 65. West wind around 5 mph.

    High: 65 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers, mainly after 11pm. Increasing clouds, with a low around 46. Calm wind becoming south around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers before 8am, then a chance of showers after 2pm. Mostly cloudy, with a high near 62. West wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 2am. Mostly cloudy, with a low around 40. North wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 61. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 61 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 65. West wind around 5 mph.
Tonight
A chance of showers, mainly after 11pm. Increasing clouds, with a low around 46. Calm wind becoming south around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A slight chance of showers before 8am, then a chance of showers after 2pm. Mostly cloudy, with a high near 62. West wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A chance of showers, mainly before 2am. Mostly cloudy, with a low around 40. North wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Mostly sunny, with a high near 61. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Wednesday
Showers likely. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Thursday
A chance of showers. Partly sunny, with a high near 67. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Princeton Junction NJ
 40.29°N 74.6°W (Elev. 98 ft)
Last Update:
8:19 am EDT May 1, 2026
Forecast Valid:
1pm EDT May 1, 2026-6pm EDT May 7, 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