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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 40.38°N 74.55°W (Text-Only)
NWS Forecast for: Monmouth Junction NJ
Issued by: National Weather Service Philadelphia, PA
Last Update: 4:08 pm EDT Jun 29, 2026		Print

  • Overnight

    Overnight: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90. Southwest wind 5 to 15 mph.

    High: 90 °F

    Sunny

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 70. Southwest wind 10 to 15 mph.

    Low: 70 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 96. Heat index values as high as 105. West wind 10 to 15 mph.

    High: 96 °F

    Sunny

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 75. Southwest wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Thursday
    Night

    Thursday Night: Clear, with a low around 78.

    Low: 78 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 102.

    High: 102 °F

    Hot

  • Friday
    Night

    Friday Night: A chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 76. Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    T-storms



    • Overnight: Mostly clear, with a low around 65. Calm wind.

    Tuesday: Sunny, with a high near 90. Southwest wind 5 to 15 mph.

    Tuesday Night: Partly cloudy, with a low around 70. Southwest wind 10 to 15 mph.

    Wednesday: Sunny, with a high near 96. Heat index values as high as 105. West wind 10 to 15 mph.

    Wednesday Night: Mostly clear, with a low around 75. Southwest wind 5 to 10 mph.

    Thursday: Sunny and hot, with a high near 100.

    Thursday Night: Clear, with a low around 78.

    Friday: Sunny and hot, with a high near 102.

    Friday Night: A chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 76. Chance of precipitation is 30%.

    Independence Day: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 99. Chance of precipitation is 50%.

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.

    Sunday: A chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 30%.

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.

    Monday: A chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 40%.


    Monmouth Junction NJ
     40.38°N 74.55°W (Elev. 98 ft)

    Visit your local NWS office at: https://www.weather.gov/phi/