Delaware River - Trenton Weather Forecast

    • 21
    • 48

    Decreasing Clouds

    • 28
    • 31

    Snow/Sleet

    • 23
    • 36

    Chance Snow

    • 34
    • 38

    Rain

    • 23
    • 52

    Chance Rain

    • 22
    • 33

    Mostly Cloudy

Today 25 Dec Mercer

Partly sunny. Highs in the upper 40s. Southwest Winds 5 to 10 Mph, becoming northwest this afternoon.

Tonight 25 Dec Mercer

Partly cloudy in the Evening, then clearing. Cold with Lows around 20. North Winds 5 to 10 Mph.

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Delaware River - Trenton Temperature Statistics

December Temperature

Trenton, Mercer County Airport (6.8 miles)

  • Lowest 9 December, 2025

    10.9 °F

  • Average December

    31.3 °F

  • Highest 19 December, 2025

    57 °F

Climate (2020–Present)

Trenton, Mercer County Airport (6.8 miles)

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  • Average Low 2020–2025

    46.1 °F

  • Average 2020–2025

    55.3 °F

  • Average High 2020–2025

    64.3 °F
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