South Trenton Weather Forecast

    • 23
    • 46

    Decreasing Clouds

    • 28
    • 39

    Mostly Cloudy

    • 34
    • 46

    Chance Rain

    • 30
    • 44

    Mostly Cloudy

    • 36
    • 45

    Chance Rain

    • 34
    • 54

    Slight Chance Rain

Today 21 Dec Mercer

Mostly sunny. Highs in the mid 40s. Temperature falling into the upper 30s in the afternoon. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 21 Dec Mercer

Mostly clear. Cold with Lows in the lower 20s. Northwest Winds 5 to 10 Mph.

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South Trenton Temperature Statistics

December Temperature

Trenton, Mercer County Airport (5.6 miles)

  • Lowest 9 December, 2025

    10.9 °F

  • Average December

    30.3 °F

  • Highest 18 December, 2025

    50 °F

Climate (2020–Present)

Trenton, Mercer County Airport (5.6 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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