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

38°F

3°C

Humidity 97%
Wind Speed W 5 mph
Barometer 30.21 in (1022.6 mb)
Dewpoint 37°F (3°C)
Visibility 4.00 mi
Wind Chill34°F (1°C)
Last update 4 Mar 2:53 am EST
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Overnight

    Overnight: A chance of rain, mainly before 4am. Patchy fog. Otherwise, cloudy, with a low around 34. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 34 °F

    Chance Rain
    and Patchy
    Fog

  • Wednesday

    Wednesday: A slight chance of rain before noon, then a slight chance of rain after 3pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 51. Calm wind. Chance of precipitation is 20%.

    High: 51 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: A slight chance of rain before 1am, then rain likely after 2am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 38. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Rain Likely
    and Patchy
    Fog

  • Thursday

    Thursday: Showers. Areas of fog before 1pm. High near 47. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 47 °F

    Showers and
    Areas Fog

  • Thursday Night

    Thursday Night: Showers. Patchy fog after 1am. Low around 39. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Showers and
    Patchy Fog

  • Friday

    Friday: A slight chance of showers before 1pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 47. Chance of precipitation is 20%.

    High: 47 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Cloudy, with a low around 41.

    Low: 41 °F

    Cloudy

  • Saturday

    Saturday: A chance of showers after 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 30%.

    High: 66 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

Detailed Forecast

Overnight
A chance of rain, mainly before 4am. Patchy fog. Otherwise, cloudy, with a low around 34. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A slight chance of rain before noon, then a slight chance of rain after 3pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 51. Calm wind. Chance of precipitation is 20%.
Wednesday Night
A slight chance of rain before 1am, then rain likely after 2am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 38. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Showers. Areas of fog before 1pm. High near 47. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers. Patchy fog after 1am. Low around 39. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A slight chance of showers before 1pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 47. Chance of precipitation is 20%.
Friday Night
Cloudy, with a low around 41.
Saturday
A chance of showers after 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 30%.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Sunday
Mostly sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Mostly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Trenton, Mercer County Airport NJ
 40.28°N 74.83°W (Elev. 200 ft)
Last Update:
1:59 am EST Mar 4, 2026
Forecast Valid:
3am EST Mar 4, 2026-6pm EDT Mar 10, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation