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

46°F

8°C

Humidity 71%
Wind Speed W 8 mph
Barometer 29.88 in (1011.3 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 7 Nov 11:53 pm EST
Extended Forecast for

4 Miles SSW Princeton Junction NJ

  • Overnight

    Overnight: Partly cloudy, with a low around 42. West wind 5 to 10 mph.

    Low: 42 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 62. West wind 5 to 15 mph.

    High: 62 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. West wind around 5 mph.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 61. West wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 61 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 34. West wind around 5 mph.

    Low: 34 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 42. West wind 5 to 10 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 62. West wind 5 to 15 mph.
Sunday Night
Mostly clear, with a low around 39. West wind around 5 mph.
Monday
Mostly sunny, with a high near 61. West wind 10 to 15 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 34. West wind around 5 mph.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Mostly clear, with a low around 36.
Veterans Day
Sunny, with a high near 63.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
A chance of rain after 1pm. Partly sunny, with a high near 59. Chance of precipitation is 40%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Friday
A chance of rain. Partly sunny, with a high near 51. Chance of precipitation is 50%.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.
Saturday
Mostly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Princeton Junction NJ
 40.28°N 74.63°W (Elev. 98 ft)
Last Update:
4:07 pm EST Nov 7, 2026
Forecast Valid:
12am EST Nov 8, 2026-6pm EST Nov 14, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation