Delaware River - Port Penn Weather Forecast

    • 50
    • 69

    Becoming Sunny

    • 56
    • 75

    Mostly Sunny

    • 54
    • 76

    Partly Sunny

    • 54
    • 72

    Chance Rain Showers

    • 55
    • 75

    Mostly Sunny

    • 61
    • 81

    Mostly Sunny

    • 67
    • 87

    Partly Sunny

Today 30 May New Castle

Sunny. Highs around 70. North Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 30 May New Castle

Mostly clear. Lows around 50. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Delaware River - Port Penn Temperature Statistics

May Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 12 May, 2026

    39.7 °F

  • Average May

    65.1 °F

  • Highest 19 May, 2026

    96.7 °F

Climate (2021–Present)

Wilmington, New Castle County Airport (10.6 miles)

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  • Average Low 2021–2026

    48 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    66.6 °F
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