Delaware River - Port Penn Weather Forecast

    • 66
    • 87

    Mostly Sunny

    • 74
    • 88

    Partly Sunny

    • 74
    • 88

    Rain Showers Likely

    • 73
    • 91

    Thunderstorms Likely

    • 72
    • 88

    Chance Thunderstorms

    • 72
    • 88

    Rain Showers Likely

    • 71
    • 85

    Chance Rain Showers

Today 5 Jul New Castle

Sunny, hot with Highs in the upper 80s. Southeast Winds around 5 Mph.

Tonight 5 Jul New Castle

Mostly clear this Evening, then becoming partly cloudy. Lows in the mid 60s. South Winds around 5 Mph.

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Delaware River - Port Penn Temperature Statistics

July Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 3 July, 2025

    70 °F

  • Average July

    79 °F

  • Highest 1 July, 2025

    91.9 °F

Climate (2020–Present)

Wilmington, New Castle County Airport (10.6 miles)

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  • Average Low 2020–2025

    48.2 °F

  • Average 2020–2025

    57.3 °F

  • Average High 2020–2025

    66.5 °F
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