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

43°F

6°C

Humidity 89%
Wind Speed Calm
Barometer 30.23 in (1023.4 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 5 Mar 1:53 am EST
Extended Forecast for

Monmouth Junction NJ

  • Overnight

    Overnight: Rain likely, mainly after 5am. Patchy fog. Otherwise, cloudy, with a low around 38. Calm wind becoming east around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Rain Likely
    and Patchy
    Fog

  • Thursday

    Thursday: Rain, mainly before 2pm. Widespread fog, mainly after 4pm. High near 44. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain and
    Patchy Fog
    then Rain
    Likely and
    Fog

  • Thursday Night

    Thursday Night: Rain, mainly before 3am. Widespread fog, mainly before 7pm. 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.

    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%.

    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

Detailed Forecast

Overnight
Rain likely, mainly after 5am. Patchy fog. Otherwise, cloudy, with a low around 38. Calm wind becoming east around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain, mainly before 2pm. Widespread fog, mainly after 4pm. High near 44. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain, mainly before 3am. Widespread fog, mainly before 7pm. 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.
Saturday Night
Showers likely. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.
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%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monmouth Junction NJ
 40.38°N 74.55°W (Elev. 98 ft)
Last Update:
1:33 am EST Mar 5, 2026
Forecast Valid:
2am EST Mar 5, 2026-6pm EDT Mar 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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