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

42°F

6°C

Humidity 41%
Wind Speed S 7 mph
Barometer 30.33 in (1026.7 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 24 Mar 7:53 pm EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Tonight

    Tonight: Increasing clouds, with a low around 34. Southwest wind around 5 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 56. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 56 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 43. South wind around 5 mph.

    Low: 43 °F

    Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 70. Southwest wind 10 to 15 mph.

    High: 70 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Rain, mainly after 2am. Low around 50. Southwest wind around 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Chance Rain
    then Rain

  • Friday

    Friday: Rain, mainly before 8am. High near 58. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Rain then
    Chance Rain

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 45.

    High: 45 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 34. Southwest wind around 5 mph.
Wednesday
Partly sunny, with a high near 56. Light southwest wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Cloudy, with a low around 43. South wind around 5 mph.
Thursday
Partly sunny, with a high near 70. Southwest wind 10 to 15 mph.
Thursday Night
Rain, mainly after 2am. Low around 50. Southwest wind around 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain, mainly before 8am. High near 58. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Sunny, with a high near 45.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Sunny, with a high near 52.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Partly sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Trenton, Mercer County Airport NJ
 40.27°N 74.8°W (Elev. 157 ft)
Last Update:
4:09 pm EDT Mar 24, 2026
Forecast Valid:
7pm EDT Mar 24, 2026-6pm EDT Mar 31, 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