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.

Fog/Mist

40°F

4°C

Humidity 97%
Wind Speed E 7 mph
Barometer 30.39 in (1028.7 mb)
Dewpoint 39°F (4°C)
Visibility 2.50 mi
Wind Chill35°F (2°C)
Last update 3 Apr 1:53 am EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Overnight

    Overnight: Patchy drizzle before 5am. Patchy dense fog. Otherwise, cloudy, with a low around 38. East wind around 5 mph.

    Low: 38 °F

    Patchy
    Drizzle and
    Patchy Dense
    Fog

  • Friday

    Friday: Areas of dense fog before noon. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 72. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 72 °F

    Areas Dense
    Fog then
    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 59. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers after 5pm. Mostly sunny, with a high near 76. West wind 5 to 10 mph becoming east in the morning. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 53. East wind around 10 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers. High near 70. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 70 °F

    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy drizzle before 5am. Patchy dense fog. Otherwise, cloudy, with a low around 38. East wind around 5 mph.
Friday
Areas of dense fog before noon. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 72. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 59. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers after 5pm. Mostly sunny, with a high near 76. West wind 5 to 10 mph becoming east in the morning. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 53. East wind around 10 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers. High near 70. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Mostly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Mostly sunny, with a high near 52.
Tuesday Night
Mostly clear, with a low around 30.
Wednesday
Sunny, with a high near 54.
Wednesday Night
Mostly clear, with a low around 37.
Thursday
Sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Trenton, Mercer County Airport NJ
 40.27°N 74.8°W (Elev. 157 ft)
Last Update:
4:10 am EDT Apr 3, 2026
Forecast Valid:
4am EDT Apr 3, 2026-6pm EDT Apr 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation