Mercerville-Hamilton Square Weather Forecast

    • 68
    • 85

    Increasing Clouds

    • 59
    • 83

    Partly Sunny

    • 59
    • 75

    Rain Showers Likely

    • 59
    • 75

    Rain Showers

    • 56
    • 70

    Mostly Cloudy

    • 54
    • 68

    Slight Chance Rain Showers

Today 17 Sep Mercer

Partly sunny. Highs in the mid 80s. Southwest Winds around 5 Mph.

Tonight 17 Sep Mercer

Mostly cloudy with a 20 percent chance of Showers. Humid with Lows in the upper 60s. Southwest Winds around 5 Mph.

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Mercerville-Hamilton Square Temperature Statistics

September Temperature

Trenton, Mercer County Airport (8.1 miles)

  • Lowest 15 September, 2026

    52 °F

  • Average September

    72.9 °F

  • Highest 1 September, 2026

    88.6 °F

Climate (2021–2026)

Trenton, Mercer County Airport (8.1 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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