Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Partly Cloudy

70°F

21°C

Humidity 61%
Wind Speed NE 12 mph
Barometer 30.09 in (1018.2 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 21 Sep 12:53 pm EDT
Extended Forecast for

Pennington NJ

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 70. Northeast wind 5 to 10 mph.

    High: 70 °F

    Mostly Cloudy

  • Tonight

    Tonight: Showers likely, mainly after 4am.  Cloudy, with a low around 53. Northeast wind 5 to 10 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 53 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely before 3pm, then a chance of showers after 4pm.  Mostly cloudy, with a high near 63. Northeast wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Showers
    Likely then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 2am.  Mostly cloudy, with a low around 50. Northeast wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 20%.

    Low: 50 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64. Northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 64 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 64.

    High: 64 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers.  Partly sunny, with a high near 64. Chance of precipitation is 40%.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 70. Northeast wind 5 to 10 mph.
Tonight
Showers likely, mainly after 4am. Cloudy, with a low around 53. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Showers likely before 3pm, then a chance of showers after 4pm. Mostly cloudy, with a high near 63. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 50. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 64. Northeast wind around 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 50.
Thursday
Mostly cloudy, with a high near 64.
Thursday Night
Mostly cloudy, with a low around 49.
Friday
A chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 40%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 65. Chance of precipitation is 40%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
Pennington NJ
 40.32°N 74.79°W (Elev. 203 ft)
4:09 am EDT Sep 21, 2026
1pm EDT Sep 21, 2026-6pm EDT Sep 27, 2026
 
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Additional Resources

Radar & Satellite Image

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