Delaware River - Port Penn Weather Forecast

    • 49
    • 64

    Mostly Sunny

    • 47
    • 68

    Partly Sunny

    • 44
    • 64

    Mostly Sunny

    • 48
    • 67

    Mostly Sunny

    • 44
    • 62

    Mostly Sunny

    • 43
    • 61

    Mostly Sunny

Today 19 Oct New Castle

Sunny. Highs in the mid 60s. North Winds 5 to 10 Mph.

Tonight 19 Oct New Castle

Mostly clear. Lows in the upper 40s. North Winds 5 to 10 Mph.

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Delaware River - Port Penn Temperature Statistics

October Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 7 October, 2026

    42.7 °F

  • Average October

    64.8 °F

  • Highest 2 October, 2026

    86.6 °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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