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

Tracking Storm System Across the Eastern U.S.

A storm system will continue to produce widespread showers and thunderstorms as it progresses eastward across the central U.S. into the Northeast through the weekend. There are risks of severe thunderstorms and excessive rainfall on Saturday from the Ozarks into the mid-Mississippi River Valley with potential for damaging winds, large hail, tornadoes, and flash flooding. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

67°F

19°C

Humidity 33%
Wind Speed W 8 mph
Barometer 30.03 in (1016.2 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 18 Oct 12:53 pm EDT
Extended Forecast for

Princeton Junction NJ

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 69. Calm wind.

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 77. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 77 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Showers, with thunderstorms also possible after 2am. Low around 53. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Showers

  • Monday

    Monday: A chance of showers and thunderstorms. Partly sunny, with a high near 64. Southwest wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 50%.

    Low: 47 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 69. Calm wind.
Tonight
Mostly clear, with a low around 47. Calm wind.
Sunday
Mostly sunny, with a high near 77. South wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Showers, with thunderstorms also possible after 2am. Low around 53. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 64. Southwest wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Sunny, with a high near 69.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 50%.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Mostly sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Mostly sunny, with a high near 62.
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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:
4:09 am EDT Oct 18, 2025
Forecast Valid:
1pm EDT Oct 18, 2025-6pm EDT Oct 24, 2025
 
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