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

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Overcast

2°C

35°F

Humidity 70%
Wind Speed E 11 km/h
Barometer 1017.0 mb (30.05 in)
Dewpoint -3°C (26°F)
Visibility 16 km
Wind Chill-2°C (29°F)
Last update 15 Feb 6:53 pm EST
Extended Forecast for

Princeton NJ

  • Tonight

    Tonight: Snow, mainly before 4am. Patchy fog after 4am. Low around -1. Northeast wind 15 to 25 km/h. Chance of precipitation is 100%. Total nighttime snow accumulation of 2 to 4 centimeters possible.

    Low: -1 °C

    Snow and
    Patchy Fog

  • Washington's Birthday

    Washington's Birthday: A chance of snow, mainly before 7am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 5. Northeast wind 10 to 20 km/h. Chance of precipitation is 30%. New snow accumulation of less than a half centimeter possible.

    High: 5 °C

    Chance Snow
    and Patchy
    Fog then
    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around -2. South wind 5 to 10 km/h becoming calm in the evening.

    Low: -2 °C

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 8. West wind 5 to 10 km/h.

    High: 8 °C

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 1. Calm wind.

    Low: 1 °C

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Cloudy, with a high near 7. Chance of precipitation is 50%. New precipitation amounts between 2.5 and 5 mm possible.

    High: 7 °C

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am. Mostly cloudy, with a low around 2. Chance of precipitation is 30%.

    Low: 2 °C

    Chance Rain

  • Thursday

    Thursday: Mostly cloudy, with a high near 7.

    High: 7 °C

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of rain after 1am. Mostly cloudy, with a low around 2. Chance of precipitation is 30%.

    Low: 2 °C

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Snow, mainly before 4am. Patchy fog after 4am. Low around -1. Northeast wind 15 to 25 km/h. Chance of precipitation is 100%. Total nighttime snow accumulation of 2 to 4 centimeters possible.
Washington's Birthday
A chance of snow, mainly before 7am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 5. Northeast wind 10 to 20 km/h. Chance of precipitation is 30%. New snow accumulation of less than a half centimeter possible.
Monday Night
Mostly cloudy, with a low around -2. South wind 5 to 10 km/h becoming calm in the evening.
Tuesday
Partly sunny, with a high near 8. West wind 5 to 10 km/h.
Tuesday Night
Mostly cloudy, with a low around 1. Calm wind.
Wednesday
A chance of rain. Cloudy, with a high near 7. Chance of precipitation is 50%. New precipitation amounts between 2.5 and 5 mm possible.
Wednesday Night
A chance of rain before 1am. Mostly cloudy, with a low around 2. Chance of precipitation is 30%.
Thursday
Mostly cloudy, with a high near 7.
Thursday Night
A chance of rain after 1am. Mostly cloudy, with a low around 2. Chance of precipitation is 30%.
Friday
Rain likely. Mostly cloudy, with a high near 8. Chance of precipitation is 70%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 2. Chance of precipitation is 40%.
Saturday
A chance of rain. Mostly cloudy, with a high near 8. Chance of precipitation is 40%.
Saturday Night
A chance of rain. Partly cloudy, with a low around -1. Chance of precipitation is 30%.
Sunday
A chance of rain. Partly sunny, with a high near 6. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton NJ
 40.35°N 74.67°W (Elev. 190 m)
Last Update:
6:47 pm EST Feb 15, 2026
Forecast Valid:
7pm EST Feb 15, 2026-6pm EST Feb 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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