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.

Fair

43°F

6°C

Humidity 43%
Wind Speed W 9 mph
Barometer 30.06 in (1017.5 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 14 Feb 12:53 pm EST
Extended Forecast for

Monmouth Junction NJ

  • This Afternoon

    This Afternoon: Sunny, with a high near 43. West wind around 5 mph.

    High: 43 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 22. Calm wind.

    Low: 22 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of rain and snow between 1pm and 4pm, then a slight chance of snow after 4pm. Partly sunny, with a high near 40. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 40 °F

    Partly Sunny
    then Slight
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of snow. Mostly cloudy, with a low around 28. Calm wind becoming northeast around 5 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.

    Low: 28 °F

    Chance Snow

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 42. Northeast wind around 5 mph becoming calm.

    High: 42 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Cloudy, with a high near 47. Chance of precipitation is 50%.

    High: 47 °F

    Chance Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 43. West wind around 5 mph.
Tonight
Mostly clear, with a low around 22. Calm wind.
Sunday
A slight chance of rain and snow between 1pm and 4pm, then a slight chance of snow after 4pm. Partly sunny, with a high near 40. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 20%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 28. Calm wind becoming northeast around 5 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.
Washington's Birthday
Partly sunny, with a high near 42. Northeast wind around 5 mph becoming calm.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
A chance of rain. Cloudy, with a high near 47. Chance of precipitation is 50%.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 35. Chance of precipitation is 50%.
Thursday
A chance of rain. Mostly cloudy, with a high near 50. Chance of precipitation is 30%.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 40%.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 42. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monmouth Junction NJ
 40.38°N 74.55°W (Elev. 98 ft)
Last Update:
4:15 am EST Feb 14, 2026
Forecast Valid:
1pm EST Feb 14, 2026-6pm EST Feb 20, 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