Pennington Weather Forecast

    • 55
    • 69

    Decreasing Clouds

    • 56
    • 80

    Mostly Sunny

    • 55
    • 78

    Partly Sunny

    • 57
    • 80

    Partly Sunny

    • 57
    • 79

    Partly Sunny

    • 56
    • 74

    Partly Sunny

    • 56
    • 76

    Partly Sunny

Today 10 Sep Mercer

Cloudy. A chance of Showers, mainly this morning. Highs in the upper 60s. Northeast Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 10 Sep Mercer

Mostly cloudy. Lows in the upper 50s. North Winds around 5 Mph.

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Pennington Temperature Statistics

September Temperature

Trenton, Mercer County Airport (3.7 miles)

  • Lowest 8 September, 2025

    51.1 °F

  • Average September

    67.9 °F

  • Highest 5 September, 2025

    86 °F

Climate (2020–Present)

Trenton, Mercer County Airport (3.7 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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