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 53%
Wind Speed N 5 mph
Barometer 30.46 in (1030.7 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 12 Apr 4:53 am EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Today

    Today: Patchy frost between 7am and 8am. Otherwise, sunny, with a high near 64. North wind 5 to 10 mph becoming south in the afternoon.

    High: 64 °F

    Patchy Frost
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 48. South wind 5 to 10 mph.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers after 2pm. Partly sunny, with a high near 78. Southwest wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 78 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57. West wind around 5 mph.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers before 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 87.

    High: 87 °F

    Partly Sunny

Detailed Forecast

Today
Patchy frost between 7am and 8am. Otherwise, sunny, with a high near 64. North wind 5 to 10 mph becoming south in the afternoon.
Tonight
Partly cloudy, with a low around 48. South wind 5 to 10 mph.
Monday
A slight chance of showers after 2pm. Partly sunny, with a high near 78. Southwest wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 57. West wind around 5 mph.
Tuesday
Mostly sunny, with a high near 85. Light southwest wind increasing to 5 to 10 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers before 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 87.
Thursday Night
Mostly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 57.
Saturday
Mostly sunny, with a high near 83.
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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:
4:11 am EDT Apr 12, 2026
Forecast Valid:
5am EDT Apr 12, 2026-6pm EDT Apr 18, 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