Fire Weather Concerns and Severe Weather

Dry and breezy conditions will bring elevated to critical fire weather conditions across portions of the northern and central High Plains through this weekend, where fuels remain largely receptive. Severe thunderstorms and heavy rainfall are possible from the Plains into the Upper Midwest, as well as in the Ohio Valley and portions of the Mid-Atlantic through this weekend. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

71°F

22°C

Humidity 73%
Wind Speed E 5 mph
Barometer 30.12 in (1019.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 12 Sep 9:53 am EDT
Extended Forecast for

Princeton Junction NJ

Flood Watch September 13, 12:00am until September 13, 12:00pm
Click here for hazard details and duration
Flood Watch
  • Today

    Today: Partly sunny, with a high near 81. Southeast wind around 5 mph.

    High: 81 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall.  Patchy fog after midnight. Low around 68. Southeast wind around 5 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Mostly Cloudy
    then Heavy
    Rain and
    Patchy Fog

  • Sunday

    Sunday: Showers and thunderstorms, mainly before 11am. Some of the storms could produce heavy rainfall.  Patchy fog before 1pm. High near 81. Calm wind becoming west around 5 mph in the afternoon.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Heavy Rain
    and Patchy
    Fog

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. Calm wind becoming west around 5 mph.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 76. North wind 5 to 10 mph.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 81. Southeast wind around 5 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Patchy fog after midnight. Low around 68. Southeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers and thunderstorms, mainly before 11am. Some of the storms could produce heavy rainfall. Patchy fog before 1pm. High near 81. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Mostly clear, with a low around 64. Calm wind becoming west around 5 mph.
Monday
Mostly sunny, with a high near 76. North wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Princeton Junction NJ
 40.3°N 74.62°W (Elev. 98 ft)
9:48 am EDT Sep 12, 2026
10am EDT Sep 12, 2026-6pm EDT Sep 18, 2026
 
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