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.

Light Rain Fog/Mist

34°F

1°C

Humidity 97%
Wind Speed NE 6 mph
Barometer 30.47 in (1031.3 mb)
Dewpoint 33°F (1°C)
Visibility 1.50 mi
Wind Chill29°F (-2°C)
Last update 3 Mar 11:53 am EST
Extended Forecast for

Princeton North NJ

  • This Afternoon

    This Afternoon: Rain. Patchy fog. High near 37. East wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 37 °F

    Rain and
    Patchy Fog

  • Tonight

    Tonight: Rain, mainly before 2am. Patchy fog before midnight. Low around 36. Calm wind becoming southwest around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 36 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of rain after 3pm. Partly sunny, with a high near 54. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.

    High: 54 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 1am. Cloudy, with a low around 40. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Chance Rain
    then Rain
    Likely

  • Thursday

    Thursday: Showers likely, mainly before 7am. Cloudy, with a high near 50. Calm wind becoming east around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 42. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Showers

  • Friday

    Friday: A chance of showers before 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.

    High: 53 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 63.

    High: 63 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Rain. Patchy fog. High near 37. East wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain, mainly before 2am. Patchy fog before midnight. Low around 36. Calm wind becoming southwest around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A slight chance of rain after 3pm. Partly sunny, with a high near 54. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.
Wednesday Night
Rain likely, mainly after 1am. Cloudy, with a low around 40. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Showers likely, mainly before 7am. Cloudy, with a high near 50. Calm wind becoming east around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Showers likely before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 42. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A chance of showers before 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 41.
Saturday
Mostly cloudy, with a high near 63.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Sunday
Mostly cloudy, with a high near 69.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.
Monday
Mostly cloudy, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton North NJ
 40.37°N 74.64°W (Elev. 98 ft)
Last Update:
11:11 am EST Mar 3, 2026
Forecast Valid:
12pm EST Mar 3, 2026-6pm EDT Mar 9, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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