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

49°F

9°C

Humidity 46%
Wind Speed W 3 mph
Barometer 29.93 in (1012.8 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 3 May 11:53 pm EDT
Extended Forecast for

Pennington NJ

  • Overnight

    Overnight: Mostly clear, with a low around 44. Southwest wind around 5 mph.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 73. Southwest wind 10 to 15 mph.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. South wind 5 to 10 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 61. South wind around 15 mph. Chance of precipitation is 30%.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers, with thunderstorms also possible after 2pm. High near 69. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 69 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.

    Low: 47 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely, mainly after 8am. Mostly cloudy, with a high near 59. Chance of precipitation is 70%.

    High: 59 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers before 2am. Partly cloudy, with a low around 39. Chance of precipitation is 30%.

    Low: 39 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 44. Southwest wind around 5 mph.
Monday
Sunny, with a high near 73. Southwest wind 10 to 15 mph.
Monday Night
Mostly clear, with a low around 55. South wind 5 to 10 mph.
Tuesday
Sunny, with a high near 83. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 61. South wind around 15 mph. Chance of precipitation is 30%.
Wednesday
Showers, with thunderstorms also possible after 2pm. High near 69. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Thursday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 59. Chance of precipitation is 70%.
Thursday Night
A chance of showers before 2am. Partly cloudy, with a low around 39. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 62.
Friday Night
Partly cloudy, with a low around 46.
Saturday
A chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 40%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 44. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 69.
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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:
8:56 pm EDT May 3, 2026
Forecast Valid:
12am EDT May 4, 2026-6pm EDT May 10, 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