Mercerville Weather Forecast

    • 59
    • 85

    Mostly Sunny

    • 59
    • 82

    Partly Sunny

    • 59
    • 77

    Mostly Cloudy

    • 59
    • 79

    Mostly Cloudy

    • 61
    • 81

    Chance Rain Showers

    • 61
    • 85

    Partly Sunny

Today 14 Sep Mercer

Sunny. Highs in the mid 80s. Light and variable Winds, becoming northeast around 5 Mph this afternoon.

Tonight 14 Sep Mercer

Partly cloudy in the Evening, then becoming mostly clear. Patchy fog after midnight. Lows in the upper 50s. Southeast Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mercerville Temperature Statistics

September Temperature

Trenton, Mercer County Airport (6.8 miles)

  • Lowest 8 September, 2025

    51.1 °F

  • Average September

    67.2 °F

  • Highest 5 September, 2025

    86 °F

Climate (2020–Present)

Trenton, Mercer County Airport (6.8 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    55.3 °F

  • Average High 2020–2025

    64.4 °F
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