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.

Light Rain Fog/Mist

43°F

6°C

Humidity 97%
Wind Speed E 9 mph
Barometer 30.18 in (1021.6 mb)
Dewpoint 42°F (6°C)
Visibility 3.00 mi
Wind Chill38°F (3°C)
Last update 5 Mar 1:53 pm EST
Extended Forecast for

Monmouth Junction NJ

  • This Afternoon

    This Afternoon: A chance of rain, mainly before 4pm. Widespread fog, mainly after 3pm. Otherwise, cloudy, with a high near 44. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Chance Rain
    and Fog

  • Tonight

    Tonight: Rain, mainly before 3am. Widespread fog, mainly after 3am. Low around 37. Northeast wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 37 °F

    Rain and Fog

  • Friday

    Friday: Areas of fog before 10am. Otherwise, cloudy, with a high near 44. Northeast wind around 5 mph.

    High: 44 °F

    Areas Fog
    then Cloudy

  • Friday Night

    Friday Night: A chance of showers, mainly after 1am. Patchy fog after 1am. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 10am. Otherwise, cloudy, with a high near 58. Calm wind becoming south around 5 mph in the afternoon.

    High: 58 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: Showers likely. Mostly cloudy, with a low around 51. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Showers
    Likely

  • Sunday

    Sunday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of rain, mainly before 4pm. Widespread fog, mainly after 3pm. Otherwise, cloudy, with a high near 44. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain, mainly before 3am. Widespread fog, mainly after 3am. Low around 37. Northeast wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Friday
Areas of fog before 10am. Otherwise, cloudy, with a high near 44. Northeast wind around 5 mph.
Friday Night
A chance of showers, mainly after 1am. Patchy fog after 1am. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Patchy fog before 10am. Otherwise, cloudy, with a high near 58. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Showers likely. Mostly cloudy, with a low around 51. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Partly sunny, with a high near 65.
Sunday Night
Partly cloudy, with a low around 42.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 53.
Wednesday
A chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 30%.
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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:
5:23 am EST Mar 5, 2026
Forecast Valid:
2pm EST Mar 5, 2026-6pm EDT Mar 11, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation