Delaware Canal - Summit Harbor Weather Forecast

    • 67
    • 76

    Rain Showers Likely

    • 62
    • 82

    Slight Chance Thunderstorms

    • 62
    • 80

    Mostly Sunny

    • 63
    • 81

    Mostly Sunny

    • 67
    • 84

    Mostly Cloudy

    • 68
    • 84

    Chance Rain Showers

Today 22 Aug New Castle

Mostly cloudy. A chance of Showers in the Morning, then Showers likely with a slight chance of Thunderstorms in the afternoon. Humid with Highs in the upper 70s. East Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 22 Aug New Castle

Mostly cloudy with a chance of Showers. Humid with Lows in the mid 60s. Southeast Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Real-Time

Delaware Canal - Summit Harbor Temperature Statistics

August Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 4 August, 2026

    66.7 °F

  • Average August

    80 °F

  • Highest 7 August, 2026

    93.7 °F

Climate (2021–2026)

Wilmington, New Castle County Airport (10.6 miles)

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  • Average Low 2021–2026

    48 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    66.7 °F
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