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.

Mostly Cloudy

60°F

16°C

Humidity 35%
Wind Speed N 5 mph
Barometer 29.86 in (1010.7 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 2 May 2:53 pm EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Calm wind becoming north around 5 mph after midnight.

    Low: 38 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 60. Breezy, with a northwest wind 10 to 20 mph.

    High: 60 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 44. Southwest wind around 5 mph.

    Low: 44 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 72. Southwest wind 10 to 15 mph.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. South wind around 10 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 61.

    Low: 61 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers after 8am. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.

    High: 73 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.

    Low: 57 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Calm wind becoming north around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 60. Breezy, with a northwest wind 10 to 20 mph.
Sunday Night
Partly cloudy, with a low around 44. Southwest wind around 5 mph.
Monday
Sunny, with a high near 72. Southwest wind 10 to 15 mph.
Monday Night
Mostly clear, with a low around 55. South wind around 10 mph.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly cloudy, with a low around 61.
Wednesday
A chance of showers after 8am. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Thursday
Showers. High near 68. Chance of precipitation is 80%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 44. Chance of precipitation is 40%.
Friday
Sunny, with a high near 63.
Friday Night
Partly cloudy, with a low around 45.
Saturday
A chance of showers. Mostly sunny, with a high near 65. Chance of precipitation is 30%.
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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:
3:29 pm EDT May 2, 2026
Forecast Valid:
3pm EDT May 2, 2026-6pm EDT May 9, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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