Heavy Rainfall Threat for Portions of Mid-Atlantic and Northeast; Heat Linger for Southeast and Expands for the West

Moisture and nearby frontal boundary will focus more showers and thunderstorms for portions of the Mid-Atlantic and Northeast today. Rainfall could be locally heavy resulting instances of flash flooding. Meanwhile, the heat lingers for areas of the Southeast and expands across the Western U.S. the next several days. Between these areas, severe thunderstorms possible for the Plains and Midwest. Read More >

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fog/Mist

67°F

19°C

Humidity 97%
Wind Speed NE 12 mph
Barometer 30.02 in (1015.8 mb)
Dewpoint 66°F (19°C)
Visibility 2.50 mi
Last update 6 Jul 6:53 pm EDT
Extended Forecast for

Princeton NJ

Flood Watch July 6, 06:57pm until July 6, 08:00pm
Click here for hazard details and duration
...
  •  
    Flood Watch July 6, 06:57pm until July 6, 08:00pm

    NOW until 8:00pm Mon

    Flood Watch

  • Tonight

    Low: 64 °F

    Heavy Rain
    and Patchy
    Fog

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm.  Mostly cloudy, with a high near 75. Northeast wind around 5 mph.  Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Cloudy, then gradual clearing toward daybreak, with a low around 62. North wind around 5 mph.

    Low: 62 °F

    Clearing Late

  • Wednesday

    Wednesday: Partly sunny through mid morning, then becoming sunny, with a high near 82. North wind around 5 mph becoming calm  in the afternoon.

    High: 82 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63. South wind around 5 mph becoming calm.

    Low: 63 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 2pm.  Partly sunny, with a high near 84. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am.  Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

    Low: 69 °F

    Showers
    Likely then
    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 87. Chance of precipitation is 40%.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Tonight
Showers and thunderstorms likely before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Patchy fog after midnight. Otherwise, cloudy, with a low around 64. Northeast wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 75. Northeast wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Cloudy, then gradual clearing toward daybreak, with a low around 62. North wind around 5 mph.
Wednesday
Partly sunny through mid morning, then becoming sunny, with a high near 82. North wind around 5 mph becoming calm in the afternoon.
Wednesday Night
Partly cloudy, with a low around 63. South wind around 5 mph becoming calm.
Thursday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 65.
Monday
Mostly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton NJ
 40.37°N 74.67°W (Elev. 256 ft)
4:33 pm EDT Jul 6, 2026
6pm EDT Jul 6, 2026-6pm EDT Jul 13, 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