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.

A Few Clouds

75°F

24°C

Humidity 62%
Wind Speed SE 7 mph
Barometer 29.70 in (1004.9 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 11 Mar 5:53 pm EDT
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Tonight

    Tonight: Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 45. South wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Showers
    Likely

  • Thursday

    Thursday: Rain likely before 2pm, then a chance of rain and snow. Cloudy, with a temperature falling to around 39 by 5pm. Northwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 54 °F⇓

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 28. West wind 5 to 10 mph.

    Low: 28 °F

    Gradual
    Clearing

  • Friday

    Friday: Partly sunny, with a high near 49. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 49 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, with a high near 52.

    High: 52 °F

    Cloudy

  • Sunday Night

    Sunday Night: Rain, mainly after 2am. Low around 45. Chance of precipitation is 90%.

    Low: 45 °F

    Chance Rain
    then Rain

Detailed Forecast

Tonight
Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 45. South wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain likely before 2pm, then a chance of rain and snow. Cloudy, with a temperature falling to around 39 by 5pm. Northwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 28. West wind 5 to 10 mph.
Friday
Partly sunny, with a high near 49. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.
Friday Night
Partly cloudy, with a low around 38. South wind around 15 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 51.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
Cloudy, with a high near 52.
Sunday Night
Rain, mainly after 2am. Low around 45. Chance of precipitation is 90%.
Monday
Rain. High near 63. Chance of precipitation is 90%.
Monday Night
Rain and snow likely. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Tuesday
A chance of snow. Mostly sunny, with a high near 39. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Mostly sunny, with a high near 39.
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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:
4:10 pm EDT Mar 11, 2026
Forecast Valid:
6pm EDT Mar 11, 2026-6pm EDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation