Delaware River - Port Penn Weather Forecast

    • 72
    • 87

    Slight Chance Thunderstorms

    • 73
    • 87

    Chance Rain Showers

    • 74
    • 91

    Slight Chance Thunderstorms

    • 74
    • 91

    Slight Chance Thunderstorms

    • 71
    • 90

    Chance Rain Showers

    • 68
    • 85

    Slight Chance Rain Showers

Today 30 Aug New Castle

Mostly sunny. Patchy fog in the morning. A slight chance of Showers in the afternoon. Hot with Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 30 Aug New Castle

Partly cloudy in the Evening, then becoming mostly cloudy. Humid with Lows in the lower 70s. Southwest Winds 5 to 10 Mph.

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Delaware River - Port Penn Temperature Statistics

August Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 25 August, 2026

    59 °F

  • Average August

    78.2 °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

    47.9 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    66.7 °F
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