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 Snow Fog/Mist

32°F

0°C

Humidity 92%
Wind Speed NE 15 mph
Barometer 30.00 in (1015.5 mb)
Dewpoint 30°F (-1°C)
Visibility 3.00 mi
Wind Chill22°F (-6°C)
Last update 16 Feb 2:53 am EST
Extended Forecast for

Princeton Junction NJ

  • Overnight

    Overnight: Snow likely, mainly before 4am. Patchy fog after 4am. Otherwise, cloudy, with a low around 31. Northeast wind around 15 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of around an inch possible.

    Low: 31 °F

    Snow Likely
    and Patchy
    Fog

  • Washington's Birthday

    Washington's Birthday: A chance of snow, mainly before 7am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 41. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Chance Snow
    and Patchy
    Fog then
    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 28. South wind around 5 mph becoming calm in the evening.

    Low: 28 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 47. Calm wind becoming west around 5 mph.

    High: 47 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Cloudy, with a high near 45. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 45 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.

    Low: 36 °F

    Chance Rain

  • Thursday

    Thursday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of rain after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.

    Low: 35 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Overnight
Snow likely, mainly before 4am. Patchy fog after 4am. Otherwise, cloudy, with a low around 31. Northeast wind around 15 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of around an inch possible.
Washington's Birthday
A chance of snow, mainly before 7am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 41. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Monday Night
Mostly cloudy, with a low around 28. South wind around 5 mph becoming calm in the evening.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 47. Calm wind becoming west around 5 mph.
Tuesday Night
Mostly cloudy, with a low around 33. Calm wind.
Wednesday
A chance of rain. Cloudy, with a high near 45. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
A chance of rain before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.
Thursday
Mostly cloudy, with a high near 46.
Thursday Night
A chance of rain after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.
Friday
Rain likely. Mostly cloudy, with a high near 47. Chance of precipitation is 70%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 36. Chance of precipitation is 40%.
Saturday
A chance of rain. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.
Saturday Night
A chance of rain. Partly cloudy, with a low around 30. Chance of precipitation is 30%.
Sunday
A chance of rain. Mostly cloudy, with a high near 43. Chance of precipitation is 30%.
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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:
6:47 pm EST Feb 15, 2026
Forecast Valid:
3am EST Feb 16, 2026-6pm EST Feb 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation