Delaware River - Port Penn Weather Forecast

    • 52
    • 55

    Rain

    • 59
    • 70

    Rain

    • 62
    • 77

    Rain Showers Likely

    • 62
    • 77

    Mostly Cloudy

    • 64
    • 81

    Mostly Cloudy

    • 59
    • 81

    Chance Rain Showers

    • 56
    • 75

    Slight Chance Rain Showers

Today 23 May New Castle

Rain. Near steady temperature in the lower 50s. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

Tonight 23 May New Castle

Rain. A slight chance of Thunderstorms after midnight. Lows in the lower 50s. Temperature rising into the mid 50s after midnight. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

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  • 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

    64.8 °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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