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

77°F

25°C

Humidity 66%
Wind Speed W 5 mph
Barometer 29.89 in (1011.4 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 14 Oct 5:53 pm EDT
Extended Forecast for

Trenton NJ

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. West wind 5 to 10 mph becoming north after midnight.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 66. North wind around 5 mph.

    High: 66 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers, then showers and possibly a thunderstorm after 3am. Low around 54. Southeast wind around 5 mph becoming calm. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Partly Cloudy
    then Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 2pm, then a chance of showers between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 78. Southwest wind 5 to 15 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 47. Northwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers

  • Saturday

    Saturday: A chance of showers before 8am. Mostly sunny, with a high near 55. Breezy. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Breezy.
    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy frost. Otherwise, mostly clear, with a low around 36.

    Low: 36 °F

    Patchy Frost

  • Sunday

    Sunday: Patchy frost before 10am. Otherwise, sunny, with a high near 58.

    High: 58 °F

    Patchy Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 54. West wind 5 to 10 mph becoming north after midnight.
Thursday
Sunny, with a high near 66. North wind around 5 mph.
Thursday Night
A chance of showers, then showers and possibly a thunderstorm after 3am. Low around 54. Southeast wind around 5 mph becoming calm. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 78. Southwest wind 5 to 15 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm. Low around 47. Northwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A chance of showers before 8am. Mostly sunny, with a high near 55. Breezy. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Patchy frost. Otherwise, mostly clear, with a low around 36.
Sunday
Patchy frost before 10am. Otherwise, sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 38.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Trenton NJ
 40.22°N 74.75°W (Elev. 23 ft)
Last Update:
4:11 pm EDT Oct 14, 2026
Forecast Valid:
6pm EDT Oct 14, 2026-6pm EDT Oct 21, 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