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

84°F

29°C

Humidity 44%
Wind Speed SW 9 mph
Barometer 29.85 in (1010.2 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 15 Apr 6:53 pm EDT
Extended Forecast for

Pennington NJ

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 67. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 91. Southwest wind 5 to 10 mph.

    High: 91 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 66. Southwest wind around 5 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A chance of showers, mainly after 2pm. Partly sunny, with a high near 80. Northwest wind around 5 mph. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers before 8pm. Partly cloudy, with a low around 55. North wind around 5 mph becoming calm. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 40%.

    Low: 49 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.

    High: 63 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers before 2am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.

    Low: 36 °F

    Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 67. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 91. Southwest wind 5 to 10 mph.
Thursday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 66. Southwest wind around 5 mph. Chance of precipitation is 20%.
Friday
A chance of showers, mainly after 2pm. Partly sunny, with a high near 80. Northwest wind around 5 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers before 8pm. Partly cloudy, with a low around 55. North wind around 5 mph becoming calm. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 72.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 40%.
Sunday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Sunday Night
A chance of showers before 2am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 30.
Tuesday
Sunny, with a high near 60.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Partly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pennington NJ
 40.34°N 74.79°W (Elev. 171 ft)
Last Update:
4:10 pm EDT Apr 15, 2026
Forecast Valid:
7pm EDT Apr 15, 2026-6pm EDT Apr 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