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.

Overcast

72°F

22°C

Humidity 64%
Wind Speed NW 7 mph
Barometer 29.81 in (1008.7 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 12 Oct 2:53 pm EDT
Extended Forecast for

Jamesburg NJ

  • Tonight

    Tonight: Patchy fog after 10pm. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 54. Northwest wind around 5 mph becoming calm.

    Low: 54 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. Southwest wind around 5 mph.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81. West wind around 5 mph.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 55. West wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.

    Low: 52 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, mainly after 8am. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.

    High: 72 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog after 10pm. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 54. Northwest wind around 5 mph becoming calm.
Tuesday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 65. Southwest wind around 5 mph.
Wednesday
Sunny, with a high near 81. West wind around 5 mph.
Wednesday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 55. West wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
A chance of showers after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
Friday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.
Friday Night
Mostly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 54.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 38.
Monday
Sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Jamesburg NJ
 40.37°N 74.46°W (Elev. 98 ft)
Last Update:
2:21 pm EDT Oct 12, 2026
Forecast Valid:
3pm EDT Oct 12, 2026-6pm EDT Oct 19, 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