National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

92°F

33°C

Humidity 37%
Wind Speed S 18 G 28 mph
Barometer 30.07 in (1017.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 18 May 5:53 pm EDT
Extended Forecast for

Lambertville NJ

Heat Advisory May 18, 06:31pm until May 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory May 18, 06:31pm until May 19, 08:00pm

    NOW until 8:00pm Tue

    Heat Advisory

  • Tonight

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. West wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73. Southwest wind 5 to 10 mph.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after 2pm. High near 91. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Sunny then
    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Low around 54. North wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Showers then
    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers between 8am and 2pm. Partly sunny, with a high near 70. Chance of precipitation is 20%.

    High: 70 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers. Partly sunny, with a high near 67. Chance of precipitation is 40%.

    High: 67 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 70. South wind 5 to 10 mph.
Tuesday
Sunny, with a high near 94. West wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 73. Southwest wind 5 to 10 mph.
Wednesday
Showers and possibly a thunderstorm after 2pm. High near 91. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Low around 54. North wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A slight chance of showers between 8am and 2pm. Partly sunny, with a high near 70. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 50.
Friday
A chance of showers. Partly sunny, with a high near 67. Chance of precipitation is 40%.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.
Saturday
Showers. High near 63. Chance of precipitation is 80%.
Saturday Night
Showers likely. Cloudy, with a low around 51. Chance of precipitation is 70%.
Sunday
A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 30%.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 73. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lambertville NJ
 40.35°N 74.93°W (Elev. 387 ft)
Last Update:
4:08 pm EDT May 18, 2026
Forecast Valid:
6pm EDT May 18, 2026-6pm EDT May 25, 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