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.

Light Rain

58°F

14°C

Humidity 90%
Wind Speed N 7 mph
Barometer 30.22 in (1022.8 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 21 May 4:53 pm EDT
Extended Forecast for

Trenton NJ

  • This Afternoon

    This Afternoon: Showers. High near 63. Northeast wind around 10 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Showers

  • Tonight

    Tonight: Showers likely, mainly before 8pm. Cloudy, with a low around 51. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Showers
    Likely then
    Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 63. East wind around 10 mph, with gusts as high as 20 mph.

    High: 63 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A slight chance of showers before 8pm, then rain likely after midnight. Cloudy, with a low around 47. East wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 47 °F

    Slight Chance
    Showers then
    Rain Likely

  • Saturday

    Saturday: Rain. High near 57. East wind 10 to 15 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 57 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 48. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 48 °F

    Rain

  • Sunday

    Sunday: Rain likely before 11am, then showers likely between 11am and 2pm. Cloudy, with a high near 66. Chance of precipitation is 70%.

    High: 66 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Cloudy, with a low around 54. Chance of precipitation is 30%.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Showers

  • Memorial Day

    Memorial Day: A chance of showers. Cloudy, with a high near 71. Chance of precipitation is 40%.

    High: 71 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Showers. High near 63. Northeast wind around 10 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers likely, mainly before 8pm. Cloudy, with a low around 51. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly cloudy, with a high near 63. East wind around 10 mph, with gusts as high as 20 mph.
Friday Night
A slight chance of showers before 8pm, then rain likely after midnight. Cloudy, with a low around 47. East wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain. High near 57. East wind 10 to 15 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain. Low around 48. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Sunday
Rain likely before 11am, then showers likely between 11am and 2pm. Cloudy, with a high near 66. Chance of precipitation is 70%.
Sunday Night
A chance of showers after 2am. Cloudy, with a low around 54. Chance of precipitation is 30%.
Memorial Day
A chance of showers. Cloudy, with a high near 71. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
Mostly cloudy, with a high near 80.
Tuesday Night
Mostly cloudy, with a low around 59.
Wednesday
Partly sunny, with a high near 83.
Wednesday Night
Mostly cloudy, with a low around 59.
Thursday
Mostly sunny, with a high near 81.
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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:
4:08 pm EDT May 21, 2026
Forecast Valid:
4pm EDT May 21, 2026-6pm EDT May 28, 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