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

76°F

24°C

Humidity 47%
Wind Speed S 18 G 30 mph
Barometer 29.91 in (1012.3 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 31 Mar 6:53 pm EDT
Extended Forecast for

Trenton NJ

  • Tonight

    Tonight: A slight chance of showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 66. Southwest wind 10 to 15 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Partly sunny, with a high near 80. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 46. East wind 10 to 15 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers

  • Thursday

    Thursday: A chance of showers, mainly before 8am. Cloudy, with a high near 50. East wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers before 2am. Cloudy, with a low around 43. East wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 43 °F

    Slight Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.

    Low: 59 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 66. Southwest wind 10 to 15 mph. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Partly sunny, with a high near 80. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm. Low around 46. East wind 10 to 15 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers, mainly before 8am. Cloudy, with a high near 50. East wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A slight chance of showers before 2am. Cloudy, with a low around 43. East wind 5 to 10 mph. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 77.
Friday Night
Mostly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
A chance of showers after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 56.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Mostly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Trenton NJ
 40.23°N 74.78°W (Elev. 33 ft)
Last Update:
4:11 pm EDT Mar 31, 2026
Forecast Valid:
7pm EDT Mar 31, 2026-6pm EDT Apr 7, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation