Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

57°F

14°C

Humidity 41%
Wind Speed S 14 mph
Barometer 30.43 in (1030.1 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 9 Apr 5:53 pm EDT
Extended Forecast for

Princeton Junction NJ

  • Tonight

    Tonight: Patchy frost after midnight.  Otherwise, partly cloudy, with a low around 36. Southeast wind 5 to 10 mph becoming light southwest  after midnight. Winds could gust as high as 20 mph.

    Low: 36 °F

    Partly Cloudy
    then Patchy
    Frost

  • Friday

    Friday: Patchy fog before 10am. Patchy frost before 9am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 70. Southwest wind 5 to 10 mph.

    High: 70 °F

    Patchy Frost
    and Patchy
    Fog then
    Mostly Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 48. South wind around 10 mph becoming west after midnight.

    Low: 48 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 63. Northwest wind around 15 mph, with gusts as high as 30 mph.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. Northwest wind 5 to 10 mph becoming light north  in the evening.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 79.

    High: 79 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy frost after midnight. Otherwise, partly cloudy, with a low around 36. Southeast wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.
Friday
Patchy fog before 10am. Patchy frost before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 70. Southwest wind 5 to 10 mph.
Friday Night
Increasing clouds, with a low around 48. South wind around 10 mph becoming west after midnight.
Saturday
Sunny, with a high near 63. Northwest wind around 15 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 38. Northwest wind 5 to 10 mph becoming light north in the evening.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
Mostly cloudy, with a low around 49.
Monday
Mostly cloudy, with a high near 79.
Monday Night
Mostly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
Mostly cloudy, with a low around 62.
Wednesday
Partly sunny, with a high near 88.
Wednesday Night
Mostly cloudy, with a low around 63.
Thursday
Partly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton Junction NJ
 40.32°N 74.62°W (Elev. 85 ft)
4:53 pm EDT Apr 9, 2026
6pm EDT Apr 9, 2026-6pm EDT Apr 16, 2026
 
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Additional Resources

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Hourly Weather Forecast

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