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

32°F

0°C

Humidity 36%
Wind Speed Vrbl 3 mph
Barometer 30.41 in (1029.4 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Last update 18 Mar 1:53 pm EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 39. South wind around 5 mph.

    High: 39 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 27. Southeast wind around 5 mph becoming calm in the evening.

    Low: 27 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 47. South wind around 5 mph.

    High: 47 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. South wind around 5 mph becoming calm in the evening.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 55. Light west wind becoming southwest 5 to 10 mph in the afternoon.

    High: 55 °F

    Partly Sunny

  • Friday Night

    Friday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Rain Likely

  • Saturday

    Saturday: Rain likely before 8am. Partly sunny, with a high near 61. Chance of precipitation is 60%.

    High: 61 °F

    Rain Likely
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain after 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 30%.

    High: 63 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 39. South wind around 5 mph.
Tonight
Partly cloudy, with a low around 27. Southeast wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 47. South wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 33. South wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 55. Light west wind becoming southwest 5 to 10 mph in the afternoon.
Friday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain likely before 8am. Partly sunny, with a high near 61. Chance of precipitation is 60%.
Saturday Night
Mostly cloudy, with a low around 44.
Sunday
A chance of rain after 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 30%.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 49.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Partly sunny, with a high near 47.
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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:
1:08 pm EDT Mar 18, 2026
Forecast Valid:
2pm EDT Mar 18, 2026-6pm EDT Mar 24, 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