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

69°F

21°C

Humidity 32%
Wind Speed SW 12 G 23 mph
Barometer 29.87 in (1010.8 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 4 May 1:53 pm EDT
Extended Forecast for

Princeton NJSimilar City Names

  • This Afternoon

    This Afternoon: Sunny, with a high near 73. Southwest wind around 15 mph.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. South wind 5 to 10 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 60 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Rain. High near 71. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 71 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain, mainly before 2am. Low around 49. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Rain

  • Thursday

    Thursday: A chance of rain before 8am, then showers likely, mainly after 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.

    High: 62 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 73. Southwest wind around 15 mph.
Tonight
Mostly clear, with a low around 55. South wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 84. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
Rain. High near 71. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain, mainly before 2am. Low around 49. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A chance of rain before 8am, then showers likely, mainly after 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.
Thursday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Friday
Mostly 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 67. Chance of precipitation is 30%.
Saturday Night
A chance of showers. Partly cloudy, with a low around 45. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton NJSimilar City Names
 40.35°N 74.67°W (Elev. 190 ft)
Last Update:
4:08 am EDT May 4, 2026
Forecast Valid:
2pm EDT May 4, 2026-6pm EDT May 10, 2026
 
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Additional Resources

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Chance of Precipitation