Delaware River - Port Penn Weather Forecast

    • 63
    • 83

    Chance Rain Showers

    • 62
    • 81

    Mostly Sunny

    • 64
    • 82

    Mostly Sunny

    • 69
    • 85

    Partly Sunny

    • 69
    • 84

    Chance Rain Showers

    • 69
    • 85

    Chance Rain Showers

Today 23 Aug New Castle

Patchy fog in the morning. Partly sunny with a chance of Showers in the Morning, then sunny in the afternoon. Humid with Highs in the lower 80s. Southwest Winds 5 to 10 Mph, becoming west in the afternoon. Chance of rain 50 percent.

Tonight 23 Aug New Castle

Mostly clear. Lows in the lower 60s. West Winds around 5 Mph.

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Delaware River - Port Penn Temperature Statistics

August Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 20 August, 2026

    66 °F

  • Average August

    79.9 °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

    57.4 °F

  • Average High 2021–2026

    66.7 °F
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