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 53%
Wind Speed S 7 mph
Barometer 29.69 in (1004.7 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 14 Jan 8:53 am EST
Extended Forecast for

Princeton Junction NJ

  • Today

    Today: Cloudy, with a high near 52. Southwest wind around 5 mph becoming calm in the afternoon.

    High: 52 °F

    Cloudy

  • Tonight

    Tonight: A chance of rain before 4am, then a chance of rain and snow. Cloudy, with a low around 30. Light and variable wind becoming west 5 to 10 mph after midnight. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Thursday

    Thursday: A slight chance of snow before 7am, then a slight chance of snow showers between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 37. Breezy, with a west wind 15 to 20 mph. Chance of precipitation is 20%.

    High: 37 °F

    Slight Chance
    Snow and
    Breezy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 19. West wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 19 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 33. West wind around 10 mph, with gusts as high as 20 mph.

    High: 33 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow before 1pm, then a chance of rain and snow. Partly sunny, with a high near 42. Chance of precipitation is 40%.

    High: 42 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy, with a high near 52. Southwest wind around 5 mph becoming calm in the afternoon.
Tonight
A chance of rain before 4am, then a chance of rain and snow. Cloudy, with a low around 30. Light and variable wind becoming west 5 to 10 mph after midnight. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Thursday
A slight chance of snow before 7am, then a slight chance of snow showers between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 37. Breezy, with a west wind 15 to 20 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 19. West wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Mostly sunny, with a high near 33. West wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 27.
Saturday
A chance of snow before 1pm, then a chance of rain and snow. Partly sunny, with a high near 42. Chance of precipitation is 40%.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
Partly sunny, with a high near 32.
Sunday Night
Partly cloudy, with a low around 18.
M.L.King Day
Mostly sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 17.
Tuesday
Mostly sunny, with a high near 27.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton Junction NJ
 40.32°N 74.62°W (Elev. 85 ft)
Last Update:
4:12 am EST Jan 14, 2026
Forecast Valid:
9am EST Jan 14, 2026-6pm EST Jan 20, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation