South Trenton Weather Forecast

    • 64
    • 86

    Chance Thunderstorms

    • 61
    • 82

    Partly Sunny

    • 57
    • 77

    Mostly Sunny

    • 58
    • 79

    Mostly Sunny

    • 61
    • 82

    Partly Sunny

    • 67
    • 80

    Partly Sunny

Today 4 Sep Mercer

Mostly sunny. A chance of Showers with a slight chance of Thunderstorms this afternoon. Hot with Highs in the mid 80s. Northwest Winds around 5 Mph. Chance of rain 30 percent.

Tonight 4 Sep Mercer

Mostly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Humid with Lows in the lower 60s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

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South Trenton Temperature Statistics

September Temperature

Trenton, Mercer County Airport (5.6 miles)

  • Lowest 1 September, 2026

    71.1 °F

  • Average September

    76.9 °F

  • Highest 1 September, 2026

    88 °F

Climate (2021–2026)

Trenton, Mercer County Airport (5.6 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    64.5 °F
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