Delaware River - Delaware Memorial Bridge Weather Forecast

    • 46
    • 53

    Rain

    • 28
    • 58

    Rain

    • 36
    • 40

    Partly Sunny

    • 27
    • 48

    Mostly Sunny

    • 28
    • 37

    Partly Sunny

    • 37
    • 42

    Slight Chance Rain

    • 34
    • 48

    Mostly Cloudy

Today 18 Dec New Castle

Mostly sunny. Highs in the lower 50s. Southeast Winds around 5 Mph.

Tonight 18 Dec New Castle

A chance of rain this Evening, then rain after midnight. Not as cool with Lows in the mid 40s. Temperature rising into the mid 50s after midnight. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph, increasing to south 15 to 20 Mph with Gusts up to 35 Mph after midnight. Chance of rain near 100 percent.

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Delaware River - Delaware Memorial Bridge Temperature Statistics

December Temperature

Wilmington, New Castle County Airport (4.3 miles)

  • Lowest 16 December, 2025

    16 °F

  • Average December

    31.9 °F

  • Highest 1 December, 2025

    45 °F

Climate (2020–Present)

Wilmington, New Castle County Airport (4.3 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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