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

Widespread Rain from Texas to the Central Appalachians; Heavy to Excessive Rainfall in Southern California and the Southwest

Scattered thunderstorms and widespread showers are expected from the Texas coast to the central Appalachians today. Heavy to excessive rainfall will continue in southern California into the Desert Southwest through Saturday. Heavy rain will pose a risk of flash flooding, especially across burn scar and urbanized regions. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Overcast

45°F

7°C

Humidity 80%
Wind Speed S 5 mph
Barometer 30.09 in (1018.3 mb)
Dewpoint 39°F (4°C)
Visibility 9.00 mi
Wind Chill42°F (6°C)
Last update 21 Nov 8:53 am EST
Extended Forecast for

Princeton NJ

  • Today

    Today: Cloudy, with a high near 54. Calm wind becoming southwest around 5 mph.

    High: 54 °F

    Cloudy

  • Tonight

    Tonight: Rain likely, mainly after 2am. Cloudy, with a low around 43. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 43 °F

    Chance Rain
    then Rain
    Likely

  • Saturday

    Saturday: Rain, mainly before 7am. High near 52. Northwest wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Rain then
    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28. Northwest wind around 5 mph becoming calm in the evening.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 50. Calm wind becoming west around 5 mph in the morning.

    High: 50 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain after 1pm. Cloudy, with a high near 56. Chance of precipitation is 40%.

    High: 56 °F

    Cloudy then
    Chance Rain

Detailed Forecast

Today
Cloudy, with a high near 54. Calm wind becoming southwest around 5 mph.
Tonight
Rain likely, mainly after 2am. Cloudy, with a low around 43. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain, mainly before 7am. High near 52. Northwest wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Partly cloudy, with a low around 28. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 50. Calm wind becoming west around 5 mph in the morning.
Sunday Night
Mostly clear, with a low around 32.
Monday
Sunny, with a high near 54.
Monday Night
Mostly cloudy, with a low around 35.
Tuesday
A chance of rain after 1pm. Cloudy, with a high near 56. Chance of precipitation is 40%.
Tuesday Night
Rain, mainly before 1am. Low around 48. Chance of precipitation is 80%.
Wednesday
A chance of rain. Mostly cloudy, with a high near 62. Chance of precipitation is 40%.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 42. Chance of precipitation is 50%.
Thanksgiving Day
Partly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton NJ
 40.37°N 74.67°W (Elev. 256 ft)
Last Update:
4:09 am EST Nov 21, 2025
Forecast Valid:
9am EST Nov 21, 2025-6pm EST Nov 27, 2025
 
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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