Delaware River - Port Penn Weather Forecast

    • 70
    • 81

    Rain Showers

    • 70
    • 87

    Slight Chance Thunderstorms

    • 67
    • 86

    Mostly Sunny

    • 70
    • 87

    Chance Rain Showers

    • 67
    • 85

    Chance Rain Showers

    • 65
    • 82

    Chance Rain Showers

Today 16 Aug New Castle

Mostly cloudy. A slight chance of Showers in the Morning, then Showers with a chance of Thunderstorms in the afternoon. Humid with Highs in the lower 80s. Southeast Winds 5 to 10 Mph. Chance of rain 90 percent.

Tonight 16 Aug New Castle

A chance of Thunderstorms in the evening. Showers likely. Humid with Lows around 70. South Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Real-Time

Delaware River - Port Penn Temperature Statistics

August Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 4 August, 2026

    66.7 °F

  • Average August

    80.6 °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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