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

39°F

4°C

Humidity 73%
Wind Speed E 9 mph
Barometer 30.06 in (1017.4 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 19 Feb 10:53 am EST
Extended Forecast for

Monmouth Junction NJ

  • Today

    Today: Cloudy, with a high near 43. East wind around 5 mph.

    High: 43 °F

    Cloudy

  • Tonight

    Tonight: Rain likely, mainly after 5am. Patchy fog between 9pm and 1am. Otherwise, cloudy, with a low around 35. East wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Rain Likely
    and Patchy
    Fog

  • Friday

    Friday: Rain. High near 43. East wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 43 °F

    Rain

  • Friday Night

    Friday Night: A slight chance of rain, mixing with snow after 10pm, then gradually ending. Mostly cloudy, with a low around 34. North wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 34 °F

    Slight Chance
    Rain/Snow

  • Saturday

    Saturday: Partly sunny, with a high near 48. West wind around 5 mph.

    High: 48 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of rain before 10pm, then a chance of rain and snow between 10pm and 1am, then a chance of snow after 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.

    Low: 31 °F

    Chance
    Rain/Snow

  • Sunday

    Sunday: Snow likely, mainly after 1pm. Cloudy, with a high near 38. Chance of precipitation is 60%.

    High: 38 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A chance of snow. Cloudy, with a low around 29. Chance of precipitation is 50%.

    Low: 29 °F

    Chance Snow

  • Monday

    Monday: A chance of snow before 1pm. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.

    High: 38 °F

    Chance Snow

Detailed Forecast

Today
Cloudy, with a high near 43. East wind around 5 mph.
Tonight
Rain likely, mainly after 5am. Patchy fog between 9pm and 1am. Otherwise, cloudy, with a low around 35. East wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain. High near 43. East wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A slight chance of rain, mixing with snow after 10pm, then gradually ending. Mostly cloudy, with a low around 34. North wind around 5 mph becoming calm. Chance of precipitation is 20%.
Saturday
Partly sunny, with a high near 48. West wind around 5 mph.
Saturday Night
A chance of rain before 10pm, then a chance of rain and snow between 10pm and 1am, then a chance of snow after 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Sunday
Snow likely, mainly after 1pm. Cloudy, with a high near 38. Chance of precipitation is 60%.
Sunday Night
A chance of snow. Cloudy, with a low around 29. Chance of precipitation is 50%.
Monday
A chance of snow before 1pm. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 24.
Tuesday
Sunny, with a high near 38.
Tuesday Night
Partly cloudy, with a low around 20.
Wednesday
Partly sunny, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Monmouth Junction NJ
 40.38°N 74.55°W (Elev. 98 ft)
Last Update:
4:15 am EST Feb 19, 2026
Forecast Valid:
10am EST Feb 19, 2026-6pm EST Feb 25, 2026
 
Forecast Discussion
 
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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