Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. this week. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England today. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Overcast

82°F

28°C

Humidity 51%
Wind Speed W 12 G 23 mph
Barometer 29.59 in (1001.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 29 Jul 3:53 pm EDT
Extended Forecast for

2 Miles SSE Princeton Junction NJ

  • This Afternoon

    This Afternoon: Isolated showers and thunderstorms.  Partly sunny, with a high near 82. Northwest wind around 15 mph.  Chance of precipitation is 20%.

    High: 82 °F

    Isolated
    T-storms

  • Tonight

    Tonight: Isolated showers and thunderstorms, then scattered showers after 1am.  Mostly cloudy, with a low around 62. West wind around 10 mph.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Isolated
    T-storms then
    Scattered
    Showers

  • Thursday

    Thursday: Isolated showers, then scattered showers and thunderstorms after 2pm.  Mostly cloudy, with a high near 79. Northwest wind 10 to 15 mph.  Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Mostly Cloudy
    then
    Scattered
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 62. North wind around 5 mph becoming calm  after midnight.

    Low: 62 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 84. Northwest wind around 5 mph becoming calm  in the afternoon.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 66.

    Low: 66 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers after 2pm.  Mostly cloudy, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

This Afternoon
Isolated showers and thunderstorms. Partly sunny, with a high near 82. Northwest wind around 15 mph. Chance of precipitation is 20%.
Tonight
Isolated showers and thunderstorms, then scattered showers after 1am. Mostly cloudy, with a low around 62. West wind around 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Isolated showers, then scattered showers and thunderstorms after 2pm. Mostly cloudy, with a high near 79. Northwest wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 62. North wind around 5 mph becoming calm after midnight.
Friday
Sunny, with a high near 84. Northwest wind around 5 mph becoming calm in the afternoon.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Partly sunny, with a high near 85.
Saturday Night
Mostly cloudy, with a low around 66.
Sunday
A chance of showers after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Monday Night
A chance of thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Princeton Junction NJ
 40.3°N 74.62°W (Elev. 98 ft)
3:20 pm EDT Jul 29, 2026
4pm EDT Jul 29, 2026-6pm EDT Aug 5, 2026
 
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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