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.

A Few Clouds

59°F

15°C

Humidity 87%
Wind Speed NE 7 mph
Barometer 30.35 in (1027.0 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 11 Oct 4:53 am EDT
Extended Forecast for

Pennington NJ

  • Today

    Today: Rain, with thunderstorms also possible after 5pm. High near 64. East wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 64 °F

    Rain

  • Tonight

    Tonight: Rain and possibly a thunderstorm, mainly before midnight, then a chance of showers and thunderstorms after midnight. Low around 57. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 57 °F

    Rain then
    Chance
    T-storms

  • Columbus Day

    Columbus Day: A slight chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 10am. Cloudy through mid morning, then gradual clearing, with a high near 72. North wind around 10 mph. Chance of precipitation is 20%.

    High: 72 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. Northwest wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75. Calm wind becoming south around 5 mph in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

Today
Rain, with thunderstorms also possible after 5pm. High near 64. East wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Tonight
Rain and possibly a thunderstorm, mainly before midnight, then a chance of showers and thunderstorms after midnight. Low around 57. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Columbus Day
A slight chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 10am. Cloudy through mid morning, then gradual clearing, with a high near 72. North wind around 10 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 53. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 75. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
Partly cloudy, with a low around 49.
Friday
A chance of showers. Mostly cloudy, with a high near 67. Chance of precipitation is 50%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 48. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Pennington NJ
 40.32°N 74.79°W (Elev. 203 ft)
Last Update:
4:09 am EDT Oct 11, 2026
Forecast Valid:
5am EDT Oct 11, 2026-6pm EDT Oct 17, 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