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.

Fair

37°F

3°C

Humidity 67%
Wind Speed W 7 mph
Barometer 29.88 in (1011.4 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 14 Mar 7:53 am EDT
Extended Forecast for

Monmouth Junction NJ

  • Today

    Today: Sunny, with a high near 52. Breezy, with a west wind 15 to 20 mph, with gusts as high as 40 mph.

    High: 52 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Increasing clouds, with a low around 33. Northwest wind around 5 mph becoming calm in the evening.

    Low: 33 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 52. Southeast wind 5 to 15 mph.

    High: 52 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of rain before 2am, then showers after 2am. Low around 44. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 44 °F

    Chance Rain
    then Showers

  • Monday

    Monday: Showers, with thunderstorms also possible after 11am. High near 67. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 67 °F

    Showers and
    Breezy

  • Monday Night

    Monday Night: Rain showers before 5am, then a chance of rain and snow showers. Low around 33. Breezy. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 33 °F

    Showers and
    Breezy then
    Rain/Snow

  • Tuesday

    Tuesday: A chance of snow before 8am. Mostly sunny, with a high near 41. Chance of precipitation is 30%.

    High: 41 °F

    Chance Snow
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 52. Breezy, with a west wind 15 to 20 mph, with gusts as high as 40 mph.
Tonight
Increasing clouds, with a low around 33. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly cloudy, with a high near 52. Southeast wind 5 to 15 mph.
Sunday Night
A chance of rain before 2am, then showers after 2am. Low around 44. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers, with thunderstorms also possible after 11am. High near 67. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Rain showers before 5am, then a chance of rain and snow showers. Low around 33. Breezy. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
A chance of snow before 8am. Mostly sunny, with a high near 41. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 23.
Wednesday
Mostly sunny, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
Partly sunny, with a high near 49.
Thursday Night
Partly cloudy, with a low around 32.
Friday
Mostly sunny, with a high near 53.
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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:
4:12 am EDT Mar 14, 2026
Forecast Valid:
8am EDT Mar 14, 2026-6pm EDT Mar 20, 2026
 
Forecast Discussion
 
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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