Delaware River - Port Penn Weather Forecast

    • 23
    • 33

    Increasing Clouds

    • 25
    • 45

    Partly Sunny

    • 41
    • 54

    Mostly Cloudy

    • 25
    • 52

    Partly Sunny

    • 34
    • 40

    Partly Sunny

    • 30
    • 49

    Slight Chance Rain

Today 16 Dec New Castle

Sunny. Highs in the lower 30s. West Winds around 5 Mph.

Tonight 16 Dec New Castle

Partly cloudy in the Evening, then clearing. Cold. Near steady temperature in the mid 20s. South Winds around 5 Mph.

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Delaware River - Port Penn Temperature Statistics

December Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 9 December, 2025

    17.1 °F

  • Average December

    33.6 °F

  • Highest 1 December, 2025

    45 °F

Climate (2020–Present)

Wilmington, New Castle County Airport (10.6 miles)

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  • Average Low 2020–2025

    48.1 °F

  • Average 2020–2025

    57.3 °F

  • Average High 2020–2025

    66.5 °F
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