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.

Light Rain

45°F

7°C

Humidity 83%
Wind Speed S 13 G 22 mph
Barometer 30.10 in (1018.6 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 22 Apr 5:53 am EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Today

    Today: Showers likely, mainly before noon. Mostly cloudy, with a high near 60. Southeast wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 60 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 73. Northwest wind 5 to 10 mph.

    High: 73 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 48. North wind around 5 mph.

    Low: 48 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 64. Northeast wind around 5 mph.

    High: 64 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A chance of showers, mainly after 2am. Mostly cloudy, with a low around 46. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely, mainly after 8am. Cloudy, with a high near 53. Chance of precipitation is 60%.

    High: 53 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly before 2am. Cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 8am. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.

    High: 61 °F

    Chance
    Showers then
    Partly Sunny

Detailed Forecast

Today
Showers likely, mainly before noon. Mostly cloudy, with a high near 60. Southeast wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 43. Calm wind.
Thursday
Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 73. Northwest wind 5 to 10 mph.
Thursday Night
Mostly cloudy, with a low around 48. North wind around 5 mph.
Friday
Mostly cloudy, with a high near 64. Northeast wind around 5 mph.
Friday Night
A chance of showers, mainly after 2am. Mostly cloudy, with a low around 46. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers likely, mainly after 8am. Cloudy, with a high near 53. Chance of precipitation is 60%.
Saturday Night
Showers likely, mainly before 2am. Cloudy, with a low around 42. Chance of precipitation is 60%.
Sunday
A chance of showers before 8am. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 64.
Monday Night
A chance of showers. Mostly cloudy, with a low around 45. Chance of precipitation is 30%.
Tuesday
Showers likely. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
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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:
4:10 am EDT Apr 22, 2026
Forecast Valid:
6am EDT Apr 22, 2026-6pm EDT Apr 28, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation