Delaware Canal - Summit Harbor Weather Forecast

    • 28
    • 32

    Snow Likely

    • 27
    • 42

    Partly Sunny

    • 25
    • 42

    Mostly Cloudy

    • 17
    • 34

    Partly Sunny

    • 29
    • 38

    Mostly Cloudy

    • 36
    • 47

    Mostly Cloudy

Today 5 Dec New Castle

Cloudy. Snow likely late this Morning, then a chance of snow this afternoon. Little or no snow accumulation. Highs in the lower 30s. Northeast Winds around 5 Mph. Chance of snow 70 percent.

Tonight 5 Dec New Castle

Cloudy. A slight chance of freezing drizzle and snow in the evening. Cold. Near steady temperature in the upper 20s. North Winds around 5 Mph. Chance of precipitation 20 percent.

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Delaware Canal - Summit Harbor Temperature Statistics

December Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 2 December, 2025

    28.9 °F

  • Average December

    37 °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

    66.6 °F
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