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.

Overcast

38°F

3°C

Humidity 89%
Wind Speed E 6 mph
Barometer 30.41 in (1029.2 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 6 Mar 9:53 pm EST
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Tonight

    Tonight: A slight chance of rain before 11pm, then a chance of rain after 1am. Patchy fog. Otherwise, cloudy, with a low around 37. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 37 °F

    Chance Rain
    and Patchy
    Fog

  • Saturday

    Saturday: A chance of rain before 7am. Patchy fog between 2pm and 3pm. Otherwise, cloudy, with a high near 50. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 50 °F

    Chance Rain
    and Areas Fog
    then Patchy
    Fog

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Patchy fog between 7pm and 11pm. Otherwise, mostly cloudy, with a temperature rising to around 57 by 3am. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F⇑

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 63. West wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. West wind around 5 mph.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 1am. Partly cloudy, with a low around 51. Chance of precipitation is 30%.

    Low: 51 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
A slight chance of rain before 11pm, then a chance of rain after 1am. Patchy fog. Otherwise, cloudy, with a low around 37. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Saturday
A chance of rain before 7am. Patchy fog between 2pm and 3pm. Otherwise, cloudy, with a high near 50. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 30%.
Saturday Night
Showers likely and possibly a thunderstorm. Patchy fog between 7pm and 11pm. Otherwise, mostly cloudy, with a temperature rising to around 57 by 3am. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 63. West wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Partly cloudy, with a low around 40. West wind around 5 mph.
Monday
Sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Sunny, with a high near 73.
Tuesday Night
A chance of showers after 1am. Partly cloudy, with a low around 51. Chance of precipitation is 30%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 70. Chance of precipitation is 50%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Thursday
A chance of showers. Mostly cloudy, with a high near 51. Chance of precipitation is 40%.
Thursday Night
Mostly cloudy, with a low around 31.
Friday
Mostly cloudy, with a high near 48.
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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:
4:09 pm EST Mar 6, 2026
Forecast Valid:
10pm EST Mar 6, 2026-6pm EDT Mar 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation