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.

Mostly Cloudy with Haze

39°F

4°C

Humidity 76%
Wind Speed Vrbl 6 mph
Barometer 29.79 in (1008.4 mb)
Dewpoint 32°F (0°C)
Visibility 6.00 mi
Wind Chill35°F (2°C)
Last update 6 Jan 4:53 pm EST
Extended Forecast for

Lawrenceville NJ

  • Tonight

    Tonight: A slight chance of rain between midnight and 1am. Widespread fog after 11pm. Otherwise, cloudy, with a low around 36. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 36 °F

    Slight Chance
    Rain and Fog

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 49 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 30. West wind around 5 mph becoming calm after midnight.

    Low: 30 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 48. Calm wind becoming west around 5 mph.

    High: 48 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely. Cloudy, with a high near 55. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 55 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely, mainly after 1am. Cloudy, with a low around 45. Chance of precipitation is 60%.

    Low: 45 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers. High near 55. Chance of precipitation is 90%.

    High: 55 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Cloudy, with a low around 38. Chance of precipitation is 70%.

    Low: 38 °F

    Showers
    Likely

Detailed Forecast

Tonight
A slight chance of rain between midnight and 1am. Widespread fog after 11pm. Otherwise, cloudy, with a low around 36. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 49. West wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 30. West wind around 5 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 48. Calm wind becoming west around 5 mph.
Thursday Night
Mostly cloudy, with a low around 33. Calm wind.
Friday
Showers likely. Cloudy, with a high near 55. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers likely, mainly after 1am. Cloudy, with a low around 45. Chance of precipitation is 60%.
Saturday
Showers. High near 55. Chance of precipitation is 90%.
Saturday Night
Showers likely, mainly before 1am. Cloudy, with a low around 38. Chance of precipitation is 70%.
Sunday
A chance of showers before 1pm. Partly sunny, with a high near 47. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Sunny, with a high near 41.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly sunny, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lawrenceville NJ
 40.31°N 74.74°W (Elev. 167 ft)
Last Update:
4:13 pm EST Jan 6, 2026
Forecast Valid:
5pm EST Jan 6, 2026-6pm EST Jan 13, 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