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

36°F

2°C

Humidity 34%
Wind Speed Calm
Barometer 30.36 in (1027.6 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Last update 18 Mar 4:53 pm EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 26. South wind around 5 mph becoming calm in the evening.

    Low: 26 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 48. Calm wind becoming south around 5 mph in the morning.

    High: 48 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 58. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 58 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Rain. Low around 44. South wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 44 °F

    Rain

  • Saturday

    Saturday: Rain likely before 8am. Partly sunny, with a high near 62. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Rain Likely
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of rain after 8pm, mixing with snow after 2am. Mostly cloudy, with a low around 39. Chance of precipitation is 40%.

    Low: 39 °F

    Chance Rain
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 26. South wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 48. Calm wind becoming south around 5 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 33. Calm wind.
Friday
Increasing clouds, with a high near 58. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
Rain. Low around 44. South wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain likely before 8am. Partly sunny, with a high near 62. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
Mostly cloudy, with a high near 66.
Sunday Night
A chance of rain after 8pm, mixing with snow after 2am. Mostly cloudy, with a low around 39. Chance of precipitation is 40%.
Monday
A chance of snow before 8am. Partly sunny, with a high near 52. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 27.
Tuesday
Partly sunny, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Trenton, Mercer County Airport NJ
 40.28°N 74.83°W (Elev. 200 ft)
Last Update:
4:09 pm EDT Mar 18, 2026
Forecast Valid:
5pm EDT Mar 18, 2026-6pm EDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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