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

36°F

2°C

Humidity 100%
Wind Speed Calm
Barometer 30.20 in (1022.4 mb)
Dewpoint 36°F (2°C)
Visibility 0.50 mi
Last update 3 Mar 10:53 pm EST
Extended Forecast for

Lawrenceville NJ

  • Tonight

    Tonight: Rain, mainly before 2am. Patchy fog before midnight. Low around 36. Southwest wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of rain after 2pm. Mostly cloudy, with a high near 54. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.

    High: 54 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 1am. Mostly cloudy, with a low around 38. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 38 °F

    Chance Rain
    then Rain
    Likely

  • Thursday

    Thursday: Showers likely, mainly before 1pm. Cloudy, with a high near 52. Calm wind becoming east around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 41. Calm wind becoming east around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Showers

  • Friday

    Friday: A slight chance of showers before 1pm. Mostly cloudy, with a high near 58. Chance of precipitation is 20%.

    High: 58 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.

    Low: 54 °F

    Showers
    Likely

Detailed Forecast

Tonight
Rain, mainly before 2am. Patchy fog before midnight. Low around 36. Southwest wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A slight chance of rain after 2pm. Mostly cloudy, with a high near 54. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.
Wednesday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 38. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Showers likely, mainly before 1pm. Cloudy, with a high near 52. Calm wind becoming east around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Showers and possibly a thunderstorm. Low around 41. Calm wind becoming east around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A slight chance of showers before 1pm. Mostly cloudy, with a high near 58. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 42.
Saturday
Mostly cloudy, with a high near 66.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Sunday
Partly sunny, with a high near 68.
Sunday Night
A chance of showers. Partly cloudy, with a low around 49. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 68.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lawrenceville NJ
 40.28°N 74.71°W (Elev. 82 ft)
Last Update:
7:15 pm EST Mar 3, 2026
Forecast Valid:
11pm EST Mar 3, 2026-6pm EDT Mar 10, 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