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

72°F

22°C

Humidity 64%
Wind Speed NW 7 mph
Barometer 29.81 in (1008.7 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 12 Oct 2:53 pm EDT
Extended Forecast for

Pennington NJ

  • Tonight

    Tonight: Patchy fog after 10pm. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 54. Northwest wind around 5 mph becoming calm.

    Low: 54 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 10am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 77. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 77 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Southwest wind around 5 mph.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81. West wind 5 to 10 mph.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 55. West wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers likely after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.

    Low: 53 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely before 8pm. Partly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely then
    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 10pm. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 54. Northwest wind around 5 mph becoming calm.
Tuesday
Patchy fog before 10am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 77. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 64. Southwest wind around 5 mph.
Wednesday
Mostly sunny, with a high near 81. West wind 5 to 10 mph.
Wednesday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 55. West wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
Showers likely after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Friday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Friday Night
Showers likely before 8pm. Partly cloudy, with a low around 43. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 54. Breezy.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 39.
Monday
Mostly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pennington NJ
 40.32°N 74.79°W (Elev. 203 ft)
Last Update:
2:21 pm EDT Oct 12, 2026
Forecast Valid:
3pm EDT Oct 12, 2026-6pm EDT Oct 19, 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