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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

A Few Clouds

68°F

20°C

Humidity 90%
Wind Speed Calm
Barometer 30.24 in (1023.3 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 17 Sep 6:53 am EDT
Extended Forecast for

Lambertville NJ

  • Today

    Today: Partly sunny, with a high near 83. Calm wind becoming south around 5 mph in the afternoon.

    High: 83 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of showers before 3am. Mostly cloudy, with a low around 67. South wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 81. North wind 5 to 10 mph.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 57. North wind around 5 mph.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 73. Northeast wind around 5 mph becoming calm in the afternoon.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 59 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 8am. High near 73. Chance of precipitation is 90%.

    High: 73 °F

    Showers

  • Sunday Night

    Sunday Night: Showers, mainly before 8pm. Low around 58. Chance of precipitation is 80%.

    Low: 58 °F

    Showers then
    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 83. Calm wind becoming south around 5 mph in the afternoon.
Tonight
A slight chance of showers before 3am. Mostly cloudy, with a low around 67. South wind around 5 mph becoming calm. Chance of precipitation is 20%.
Friday
Sunny, with a high near 81. North wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 57. North wind around 5 mph.
Saturday
Mostly sunny, with a high near 73. Northeast wind around 5 mph becoming calm in the afternoon.
Saturday Night
A chance of showers after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Showers, mainly after 8am. High near 73. Chance of precipitation is 90%.
Sunday Night
Showers, mainly before 8pm. Low around 58. Chance of precipitation is 80%.
Monday
Partly sunny, with a high near 69.
Monday Night
Mostly cloudy, with a low around 55.
Tuesday
Partly sunny, with a high near 66.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
Partly sunny, with a high near 67.
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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:
4:09 am EDT Sep 17, 2026
Forecast Valid:
7am EDT Sep 17, 2026-6pm EDT Sep 23, 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