National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Partly Cloudy

31°F

-1°C

Humidity 92%
Wind Speed S 3 mph
Barometer 30.09 in (1018.7 mb)
Dewpoint 29°F (-2°C)
Visibility 7.00 mi
Last update 17 Jan 6:53 pm EST
Extended Forecast for

Monmouth Junction NJ

Winter Weather Advisory January 18, 06:00am until January 18, 08:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: A chance of snow, mainly after 4am. Mostly cloudy, with a low around 30. Calm wind. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Snow likely, mainly after 8am. Cloudy, with a high near 34. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    High: 34 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 19. Northwest wind 5 to 10 mph. Chance of precipitation is 50%. New snow accumulation of around an inch possible.

    Low: 19 °F

    Chance Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 34. Southwest wind 5 to 10 mph, with gusts as high as 25 mph.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13. West wind around 10 mph, with gusts as high as 20 mph.

    Low: 13 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 23.

    High: 23 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 8.

    Low: 8 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of snow, mainly after 4am. Mostly cloudy, with a low around 30. Calm wind. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Snow likely, mainly after 8am. Cloudy, with a high near 34. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
A chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 19. Northwest wind 5 to 10 mph. Chance of precipitation is 50%. New snow accumulation of around an inch possible.
M.L.King Day
Mostly sunny, with a high near 34. Southwest wind 5 to 10 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 13. West wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 23.
Tuesday Night
Mostly clear, with a low around 8.
Wednesday
Mostly sunny, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
Partly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Mostly sunny, with a high near 31.
Friday Night
Mostly cloudy, with a low around 19.
Saturday
Partly sunny, with a high near 33.
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:
4:12 pm EST Jan 17, 2026
Forecast Valid:
7pm EST Jan 17, 2026-6pm EST Jan 24, 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