Delaware River - Port Penn Weather Forecast

    • 64
    • 84

    Slight Chance Rain Showers

    • 66
    • 83

    Rain Showers Likely

    • 68
    • 83

    Rain Showers

    • 66
    • 82

    Chance Thunderstorms

    • 66
    • 83

    Slight Chance Thunderstorms

    • 68
    • 85

    Slight Chance Thunderstorms

Today 26 Jul New Castle

Sunny. Highs in the mid 80s. East Winds around 5 Mph.

Tonight 26 Jul New Castle

Partly cloudy. A chance of Showers after midnight. Lows in the lower 60s. South Winds 5 to 10 Mph. Chance of rain 30 percent.

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Delaware River - Port Penn Temperature Statistics

July Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 20 July, 2026

    58.6 °F

  • Average July

    80.4 °F

  • Highest 2 July, 2026

    103.6 °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

    57.3 °F

  • Average High 2021–2026

    66.7 °F
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