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.

Fog/Mist

50°F

10°C

Humidity 100%
Wind Speed Calm
Barometer 29.85 in (1010.1 mb)
Dewpoint 50°F (10°C)
Visibility 3.00 mi
Last update 9 May 10:53 pm EDT
Extended Forecast for

Dayton NJ

  • Tonight

    Tonight: Patchy fog. Otherwise, mostly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Patchy Fog

  • Sunday

    Sunday: A slight chance of showers between 3pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 79. Light southwest wind becoming west 5 to 10 mph in the morning. Chance of precipitation is 20%.

    High: 79 °F

    Areas Fog
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 48. West wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely, mainly before 7am. Mostly cloudy, with a high near 63. Northeast wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42. Calm wind becoming north around 5 mph after midnight.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 66. Chance of precipitation is 50%.

    High: 66 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers. Low around 50. Chance of precipitation is 80%.

    Low: 50 °F

    Showers

Detailed Forecast

Tonight
Patchy fog. Otherwise, mostly cloudy, with a low around 50. Calm wind.
Sunday
A slight chance of showers between 3pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 79. Light southwest wind becoming west 5 to 10 mph in the morning. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 48. West wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Showers likely, mainly before 7am. Mostly cloudy, with a high near 63. Northeast wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Partly cloudy, with a low around 42. Calm wind becoming north around 5 mph after midnight.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
A chance of showers. Mostly cloudy, with a high near 66. Chance of precipitation is 50%.
Wednesday Night
Showers. Low around 50. Chance of precipitation is 80%.
Thursday
Showers likely. Mostly cloudy, with a high near 67. Chance of precipitation is 70%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 70. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Dayton NJ
 40.37°N 74.52°W (Elev. 98 ft)
Last Update:
7:14 pm EDT May 9, 2026
Forecast Valid:
11pm EDT May 9, 2026-6pm EDT May 16, 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