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

61°F

16°C

Humidity 97%
Wind Speed W 20 G 35 mph
Barometer 29.58 in (1000.9 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 12 Mar 6:53 am EDT
Extended Forecast for

Monmouth Junction NJ

  • Today

    Today: Rain before 5pm, then rain and snow likely. Temperature falling to around 36 by 5pm. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 57 °F⇓

    Breezy. Rain
    then
    Rain/Snow

  • Tonight

    Tonight: A chance of rain and snow, mainly before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 29. West wind 5 to 10 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 29 °F

    Chance
    Rain/Snow
    then Mostly
    Clear

  • Friday

    Friday: Mostly sunny, with a high near 49. Light southwest wind becoming south 10 to 15 mph in the morning.

    High: 49 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 53. West wind 10 to 15 mph.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 34.

    Low: 34 °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 45. Chance of precipitation is 80%.

    Low: 45 °F

    Chance Rain
    then Rain

  • Monday

    Monday: Rain. High near 65. Chance of precipitation is 90%.

    High: 65 °F

    Rain

Detailed Forecast

Today
Rain before 5pm, then rain and snow likely. Temperature falling to around 36 by 5pm. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tonight
A chance of rain and snow, mainly before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 29. West wind 5 to 10 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday
Mostly sunny, with a high near 49. Light southwest wind becoming south 10 to 15 mph in the morning.
Friday Night
Partly cloudy, with a low around 38. Southwest wind around 10 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 53. West wind 10 to 15 mph.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
Cloudy, with a high near 53.
Sunday Night
Rain, mainly after 2am. Low around 45. Chance of precipitation is 80%.
Monday
Rain. High near 65. Chance of precipitation is 90%.
Monday Night
Rain likely before 2am, then a chance of rain and snow. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Tuesday
A chance of rain and snow. Mostly sunny, with a high near 41. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 23.
Wednesday
Sunny, with a high near 40.
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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:
6:09 am EDT Mar 12, 2026
Forecast Valid:
7am 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