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Hazardous Weather Conditions

Current conditions at

Trenton, Mercer County Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

28°C

83°F

Humidity 70%
Wind Speed SW 6 km/h
Barometer 1009.5 mb (29.84 in)
Dewpoint 22°C (72°F)
Visibility 16 km
Heat Index31°C (88°F)
Last update 18 Jun 5:53 pm EDT
Extended Forecast for

Princeton Junction NJ

Heat Advisory June 19, 11:00am until June 19, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 9pm. Low around 21. Calm wind. Chance of precipitation is 80%. New precipitation amounts between 2.5 and 5 mm possible.

    Low: 21 °C

    T-storms then
    Partly Cloudy

  • Juneteenth

    Juneteenth: Showers and thunderstorms likely, mainly after 5pm. Sunny, with a high near 33. Southwest wind 10 to 15 km/h increasing to 15 to 20 km/h in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.

    High: 33 °C

    Mostly Sunny
    then T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 18. Southwest wind 10 to 15 km/h. Chance of precipitation is 60%. New precipitation amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    Low: 18 °C

    T-storms
    Likely then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 29. Northwest wind 10 to 15 km/h.

    High: 29 °C

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 18. Calm wind.

    Low: 18 °C

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 32.

    High: 32 °C

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 21.

    Low: 21 °C

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 33.

    High: 33 °C

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 22.

    Low: 22 °C

    Partly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms, mainly before 9pm. Low around 21. Calm wind. Chance of precipitation is 80%. New precipitation amounts between 2.5 and 5 mm possible.
Juneteenth
Showers and thunderstorms likely, mainly after 5pm. Sunny, with a high near 33. Southwest wind 10 to 15 km/h increasing to 15 to 20 km/h in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.
Thursday Night
Showers and thunderstorms likely, mainly before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 18. Southwest wind 10 to 15 km/h. Chance of precipitation is 60%. New precipitation amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Friday
Sunny, with a high near 29. Northwest wind 10 to 15 km/h.
Friday Night
Mostly clear, with a low around 18. Calm wind.
Saturday
Mostly sunny, with a high near 32.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
Partly sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 22.
Monday
Mostly sunny, with a high near 35.
Monday Night
Mostly clear, with a low around 23.
Tuesday
Sunny and hot, with a high near 36.
Tuesday Night
Mostly clear, with a low around 24.
Wednesday
Sunny and hot, with a high near 36.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton Junction NJ
 40.32°N 74.62°W (Elev. 85 m)
Last Update:
6:16 pm EDT Jun 18, 2025
Forecast Valid:
6pm EDT Jun 18, 2025-6pm EDT Jun 25, 2025
 
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