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.

Mostly Cloudy

31°F

-1°C

Humidity 92%
Wind Speed SW 5 mph
Barometer 29.70 in (1005.5 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 25 Feb 9:53 am EST
Extended Forecast for

Princeton Junction NJ

  • Today

    Today: A chance of rain and snow before noon, then a slight chance of rain between noon and 1pm. Cloudy early, then gradual clearing, with a high near 43. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. Total daytime snow accumulation of less than a half inch possible.

    High: 43 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Tonight

    Tonight: Partly cloudy, with a low around 29. Southwest wind around 5 mph becoming west after midnight.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of rain and snow before 1pm, then a chance of snow. Partly sunny, with a high near 40. Northwest wind around 5 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 40 °F

    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A slight chance of snow before 1am. Partly cloudy, with a low around 21. Calm wind. Chance of precipitation is 20%.

    Low: 21 °F

    Slight Chance
    Snow

  • Friday

    Friday: Mostly sunny, with a high near 42. Calm wind becoming south around 5 mph.

    High: 42 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

Detailed Forecast

Today
A chance of rain and snow before noon, then a slight chance of rain between noon and 1pm. Cloudy early, then gradual clearing, with a high near 43. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Partly cloudy, with a low around 29. Southwest wind around 5 mph becoming west after midnight.
Thursday
A slight chance of rain and snow before 1pm, then a chance of snow. Partly sunny, with a high near 40. Northwest wind around 5 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday Night
A slight chance of snow before 1am. Partly cloudy, with a low around 21. Calm wind. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 42. Calm wind becoming south around 5 mph.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Mostly sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
Partly sunny, with a high near 42.
Sunday Night
Mostly cloudy, with a low around 20.
Monday
A chance of snow. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.
Monday Night
A chance of snow. Mostly cloudy, with a low around 17. Chance of precipitation is 40%.
Tuesday
A chance of rain and snow. Partly sunny, with a high near 35. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton Junction NJ
 40.3°N 74.62°W (Elev. 98 ft)
Last Update:
6:10 am EST Feb 25, 2026
Forecast Valid:
10am EST Feb 25, 2026-6pm EST Mar 3, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation