National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fog

33°F

1°C

Humidity 100%
Wind Speed Calm
Barometer 29.98 in (1014.7 mb)
Dewpoint 33°F (1°C)
Visibility 0.25 mi
Last update 18 Feb 4:53 am EST
Extended Forecast for

Princeton Junction NJ

Dense Fog Advisory February 18, 04:59am until February 18, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory February 18, 04:59am until February 18, 10:00am

    NOW until 10:00am Wed

    Dense Fog Advisory

  • Today

    High: 45 °F

    Chance Rain
    and Dense Fog
    then Rain and
    Patchy Fog

  • Tonight

    Tonight: A chance of rain before 9pm. Patchy fog after 8pm. Otherwise, cloudy, with a low around 35. Calm wind becoming northeast around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Chance Rain
    and Patchy
    Fog then
    Patchy Fog

  • Thursday

    Thursday: A chance of rain after 1pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 42. East wind around 5 mph. Chance of precipitation is 30%.

    High: 42 °F

    Patchy Fog
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 35. East wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 35 °F

    Rain

  • Friday

    Friday: Rain. High near 44. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain

  • Friday Night

    Friday Night: A chance of rain before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of rain and snow after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.

    Low: 32 °F

    Partly Cloudy
    then Chance
    Rain/Snow

Detailed Forecast

Today
Rain, mainly after 3pm. Widespread dense fog, mainly before 10am. High near 45. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A chance of rain before 9pm. Patchy fog after 8pm. Otherwise, cloudy, with a low around 35. Calm wind becoming northeast around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A chance of rain after 1pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 42. East wind around 5 mph. Chance of precipitation is 30%.
Thursday Night
Rain. Low around 35. East wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 44. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A chance of rain before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Partly sunny, with a high near 49.
Saturday Night
A chance of rain and snow after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.
Sunday
A chance of rain and snow before 1pm, then snow likely. Cloudy, with a high near 38. Chance of precipitation is 60%.
Sunday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 60%.
Monday
A chance of snow. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton Junction NJ
 40.32°N 74.62°W (Elev. 85 ft)
Last Update:
4:13 am EST Feb 18, 2026
Forecast Valid:
4am EST Feb 18, 2026-6pm EST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation