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

43°F

6°C

Humidity 68%
Wind Speed Vrbl 5 mph
Barometer 30.12 in (1019.4 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 8 Jan 5:53 am EST
Extended Forecast for

2 Miles SSE Princeton Junction NJ

  • Today

    Today: Mostly sunny, with a high near 49. Northwest wind around 5 mph becoming calm.

    High: 49 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Partly Cloudy

  • Friday

    Friday: A chance of rain after 1pm. Mostly cloudy, with a high near 55. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 30%.

    High: 55 °F

    Partly Sunny
    then Chance
    Rain

  • Friday Night

    Friday Night: Rain likely. Cloudy, with a low around 46. South wind around 5 mph becoming northwest after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Rain Likely

  • Saturday

    Saturday: Rain. High near 54. Calm wind becoming east around 5 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 54 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 42. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Rain

  • Sunday

    Sunday: A chance of rain before 1pm. Mostly cloudy, with a high near 51. Chance of precipitation is 30%.

    High: 51 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 49. Northwest wind around 5 mph becoming calm.
Tonight
Partly cloudy, with a low around 31. Calm wind.
Friday
A chance of rain after 1pm. Mostly cloudy, with a high near 55. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 30%.
Friday Night
Rain likely. Cloudy, with a low around 46. South wind around 5 mph becoming northwest after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain. High near 54. Calm wind becoming east around 5 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Rain. Low around 42. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A chance of rain before 1pm. Mostly cloudy, with a high near 51. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Sunny, with a high near 40.
Monday Night
Partly cloudy, with a low around 28.
Tuesday
Mostly sunny, with a high near 45.
Tuesday Night
Partly cloudy, with a low around 30.
Wednesday
Mostly cloudy, with a high near 47.
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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 EST Jan 8, 2026
Forecast Valid:
6am EST Jan 8, 2026-6pm EST Jan 14, 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