Delaware River - Port Penn Weather Forecast

    • 67
    • 87

    Rain Showers

    • 66
    • 85

    Partly Sunny

    • 67
    • 83

    Partly Sunny

    • 73
    • 88

    Sunny

    • 74
    • 96

    Mostly Sunny

    • 74
    • 93

    Partly Sunny

    • 73
    • 93

    Slight Chance Thunderstorms

Today 11 Jul New Castle

Mostly cloudy. Showers and Thunderstorms likely this afternoon. Hot with Highs in the mid 80s. North Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 11 Jul New Castle

Mostly cloudy. Showers likely with a chance of Thunderstorms this evening. Lows in the upper 60s. Northeast Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Real-Time

Delaware River - Port Penn Temperature Statistics

July Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 8 July, 2026

    65.6 °F

  • Average July

    82.2 °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

    48 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    66.7 °F
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