Delaware River - Fort Delaware State Park Weather Forecast

    • 73
    • 82

    Increasing Clouds

    • 76
    • 82

    Rain Showers Likely

    • 77
    • 86

    Slight Chance Thunderstorms

    • 76
    • 86

    Chance Thunderstorms

    • 75
    • 85

    Chance Thunderstorms

    • 76
    • 85

    Slight Chance Thunderstorms

Today 4 Aug New Castle

Mostly sunny. Highs in the mid 80s. Northeast Winds around 5 Mph.

Tonight 4 Aug New Castle

Mostly cloudy. Humid with Lows in the upper 60s. East Winds around 5 Mph.

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Delaware River - Fort Delaware State Park Temperature Statistics

August Temperature

Wilmington, New Castle County Airport (5.6 miles)

  • Lowest 1 August, 2026

    68.6 °F

  • Average August

    78.4 °F

  • Highest 1 August, 2026

    86.6 °F

Climate (2021–2026)

Wilmington, New Castle County Airport (5.6 miles)

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  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    66.7 °F
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