Delaware Canal - Summit Harbor Weather Forecast

    • 63
    • 84

    Mostly Sunny

    • 66
    • 87

    Mostly Sunny

    • 72
    • 88

    Partly Sunny

    • 73
    • 88

    Chance Thunderstorms

    • 72
    • 88

    Chance Thunderstorms

    • 71
    • 88

    Chance Rain Showers

Today 4 Jul New Castle

Sunny. Highs in the mid 80s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 4 Jul New Castle

Mostly clear. Lows in the mid 60s. Northwest Winds 5 to 10 Mph, becoming north after midnight.

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Delaware Canal - Summit Harbor Temperature Statistics

July Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 1 July, 2025

    73 °F

  • Average July

    79.4 °F

  • Highest 1 July, 2025

    91.9 °F

Climate (2020–Present)

Wilmington, New Castle County Airport (10.6 miles)

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  • Average Low 2020–2025

    48.2 °F

  • Average 2020–2025

    57.3 °F

  • Average High 2020–2025

    66.5 °F
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