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

64°F

18°C

Humidity 93%
Wind Speed NW 12 mph
Barometer 29.66 in (1003.8 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 11 Mar 11:53 pm EDT
Extended Forecast for

Monmouth Junction NJ

  • Overnight

    Overnight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. Southwest wind 10 to 15 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Chance
    Showers

  • Thursday

    Thursday: Rain before 4pm, then a chance of rain and snow. Temperature falling to around 40 by 5pm. Northwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 56 °F⇓

    Rain then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 29. West wind around 5 mph.

    Low: 29 °F

    Gradual
    Clearing

  • Friday

    Friday: Partly sunny, with a high near 49. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 49 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. South wind around 15 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Saturday Night

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

    Low: 33 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, with a high near 53.

    High: 53 °F

    Cloudy

  • Sunday Night

    Sunday Night: Rain, mainly after 2am. Low around 44. Chance of precipitation is 90%.

    Low: 44 °F

    Chance Rain
    then Rain

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. Southwest wind 10 to 15 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain before 4pm, then a chance of rain and snow. Temperature falling to around 40 by 5pm. Northwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 29. West wind around 5 mph.
Friday
Partly sunny, with a high near 49. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
Friday Night
Partly cloudy, with a low around 38. South wind around 15 mph.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly cloudy, with a low around 33.
Sunday
Cloudy, with a high near 53.
Sunday Night
Rain, mainly after 2am. Low around 44. Chance of precipitation is 90%.
Monday
Rain. High near 64. Chance of precipitation is 90%.
Monday Night
Rain and snow likely. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
Tuesday
A chance of snow. Mostly sunny, with a high near 38. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 22.
Wednesday
Mostly sunny, with a high near 39.
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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:
10:05 pm EDT Mar 11, 2026
Forecast Valid:
12am EDT Mar 12, 2026-6pm EDT Mar 18, 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