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.

Fair

38°F

3°C

Humidity 97%
Wind Speed Calm
Barometer 30.11 in (1019.0 mb)
Dewpoint 37°F (3°C)
Visibility 9.00 mi
Last update 19 Apr 11:53 pm EDT
Extended Forecast for

Princeton North NJ

Freeze Watch April 21, 12:00am until April 21, 09:00am
Click here for hazard details and duration
Freeze Watch

  • Tonight

    Tonight: Patchy frost after 4am. Otherwise, increasing clouds, with a low around 36. Northwest wind around 5 mph becoming calm.

    Low: 36 °F

    Patchy Frost

  • Monday

    Monday: A chance of showers, mainly before 10am. Mostly cloudy, with a high near 53. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 53 °F

    Chance
    Showers then
    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming clear, with a low around 29. North wind around 5 mph.

    Low: 29 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 55. Calm wind becoming west around 5 mph.

    High: 55 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 41. South wind around 5 mph. Chance of precipitation is 30%.

    Low: 41 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, mainly before 8am. Partly sunny, with a high near 65. Chance of precipitation is 30%.

    High: 65 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy frost after 4am. Otherwise, increasing clouds, with a low around 36. Northwest wind around 5 mph becoming calm.
Monday
A chance of showers, mainly before 10am. Mostly cloudy, with a high near 53. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, then gradually becoming clear, with a low around 29. North wind around 5 mph.
Tuesday
Sunny, with a high near 55. Calm wind becoming west around 5 mph.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 41. South wind around 5 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers, mainly before 8am. Partly sunny, with a high near 65. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 72.
Friday Night
A chance of showers. Partly cloudy, with a low around 48. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 63. Chance of precipitation is 50%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 50%.
Sunday
A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton North NJ
 40.37°N 74.64°W (Elev. 98 ft)
Last Update:
4:11 pm EDT Apr 19, 2026
Forecast Valid:
11pm EDT Apr 19, 2026-6pm EDT Apr 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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