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.

Overcast

63°F

17°C

Humidity 52%
Wind Speed NW 12 mph
Barometer 29.93 in (1012.9 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 15 May 2:53 pm EDT
Extended Forecast for

3 Miles SSW Princeton Junction NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 49. Northwest wind 5 to 10 mph becoming light in the evening.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 81. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61. Southwest wind around 5 mph.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 87. West wind around 5 mph.

    High: 87 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 49. Northwest wind 5 to 10 mph becoming light in the evening.
Saturday
Sunny, with a high near 81. Light southwest wind increasing to 5 to 10 mph in the morning.
Saturday Night
Partly cloudy, with a low around 61. Southwest wind around 5 mph.
Sunday
Mostly sunny, with a high near 87. West wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 62. Calm wind.
Monday
Sunny, with a high near 89.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Sunny, with a high near 94.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
A chance of showers after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Princeton Junction NJ
 40.28°N 74.63°W (Elev. 98 ft)
Last Update:
6:05 am EDT May 15, 2026
Forecast Valid:
3pm EDT May 15, 2026-6pm EDT May 22, 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