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

83°F

28°C

Humidity 38%
Wind Speed S 15 G 25 mph
Barometer 29.91 in (1012.1 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 14 Apr 2:53 pm EDT
Extended Forecast for

Lawrenceville NJ

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 64. Southwest wind 5 to 10 mph becoming light in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 90. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 90 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 90. Light southwest wind becoming west 5 to 10 mph in the morning.

    High: 90 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 65. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 65 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.

    Low: 53 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 64. Southwest wind 5 to 10 mph becoming light in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Mostly sunny, with a high near 90. Light southwest wind increasing to 5 to 10 mph in the morning.
Wednesday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Thursday
Partly sunny, with a high near 90. Light southwest wind becoming west 5 to 10 mph in the morning.
Thursday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 65. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Friday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Partly sunny, with a high near 73.
Saturday Night
A chance of showers after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Sunday
A chance of showers. Mostly cloudy, with a high near 70. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 42. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 58.
Monday Night
Mostly clear, with a low around 36.
Tuesday
Sunny, with a high near 59.
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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:
4:09 am EDT Apr 14, 2026
Forecast Valid:
3pm EDT Apr 14, 2026-6pm EDT Apr 21, 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