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

49°F

9°C

Humidity 100%
Wind Speed SW 5 mph
Barometer 29.81 in (1008.8 mb)
Dewpoint 49°F (9°C)
Visibility 0.25 mi
Wind Chill47°F (8°C)
Last update 8 Mar 2:53 am EDT
Extended Forecast for

Princeton Junction NJ

Dense Fog Advisory until March 8, 07:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until March 8, 07:00am

    NOW until 7:00am Sun

    Dense Fog Advisory

  • Overnight

    Low: 48 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: A slight chance of showers before 10am. Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 69. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. West wind around 5 mph becoming calm in the evening.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 69. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. South wind around 5 mph becoming calm in the evening.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 72.

    High: 72 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 48. Southwest wind around 5 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A slight chance of showers before 10am. Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 69. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 42. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 69. Light southwest wind increasing to 5 to 10 mph in the morning.
Monday Night
Partly cloudy, with a low around 43. South wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Mostly cloudy, with a high near 72.
Wednesday Night
A chance of showers after 1am. Cloudy, with a low around 60. Chance of precipitation is 50%.
Thursday
Rain showers likely before 1pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 60. Breezy. Chance of precipitation is 70%.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 49.
Friday Night
A chance of rain. Mostly cloudy, with a low around 41. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 51.
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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:
1:50 am EST Mar 8, 2026
Forecast Valid:
1am EST Mar 8, 2026-6pm EDT Mar 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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