Delaware Canal - Summit Harbor Weather Forecast

    • 46
    • 65

    Becoming Sunny

    • 51
    • 67

    Partly Sunny

    • 51
    • 69

    Rain Showers

    • 56
    • 79

    Rain Showers Likely

    • 46
    • 69

    Slight Chance Rain Showers

    • 49
    • 67

    Partly Sunny

Today 7 May New Castle

Mostly cloudy in the Morning, then mostly sunny with a slight chance of Showers in the afternoon. Highs in the mid 60s. Northwest Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 7 May New Castle

Partly cloudy. Lows in the mid 40s. West Winds around 5 Mph.

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Delaware Canal - Summit Harbor Temperature Statistics

May Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 1 May, 2026

    42.7 °F

  • Average May

    56.9 °F

  • Highest 4 May, 2026

    73.9 °F

Climate (2021–Present)

Wilmington, New Castle County Airport (10.6 miles)

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  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    57.2 °F

  • Average High 2021–2026

    66.5 °F
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