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

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

42°F

6°C

Humidity 53%
Wind Speed N 5 mph
Barometer 30.46 in (1030.7 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 12 Apr 4:53 am EDT
Extended Forecast for

2 Miles SSE Princeton Junction NJ

  • Today

    Today: Patchy frost before 7am. Otherwise, sunny, with a high near 62. Northeast wind 5 to 10 mph becoming south in the afternoon.

    High: 62 °F

    Patchy Frost
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 46. South wind around 5 mph.

    Low: 46 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers after 2pm. Partly sunny, with a high near 79. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 79 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57. West wind around 5 mph.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers before 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny

Detailed Forecast

Today
Patchy frost before 7am. Otherwise, sunny, with a high near 62. Northeast wind 5 to 10 mph becoming south in the afternoon.
Tonight
Partly cloudy, with a low around 46. South wind around 5 mph.
Monday
A slight chance of showers after 2pm. Partly sunny, with a high near 79. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 57. West wind around 5 mph.
Tuesday
Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 62.
Wednesday
Mostly sunny, with a high near 89.
Wednesday Night
A chance of showers before 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 88.
Thursday Night
Mostly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 57.
Saturday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Princeton Junction NJ
 40.29°N 74.6°W (Elev. 98 ft)
Last Update:
4:11 am EDT Apr 12, 2026
Forecast Valid:
5am EDT Apr 12, 2026-6pm EDT Apr 18, 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