Delaware River - Port Penn Weather Forecast

    • 67
    • 91

    Rain Showers Likely

    • 66
    • 87

    Mostly Sunny

    • 57
    • 81

    Mostly Sunny

    • 62
    • 83

    Mostly Sunny

    • 70
    • 88

    Chance Rain Showers

    • 72
    • 94

    Chance Rain Showers

    • 71
    • 95

    Chance Thunderstorms

Today 6 Jun New Castle

Mostly sunny. Hot with Highs in the lower 90s. West Winds 5 to 10 Mph.

Tonight 6 Jun New Castle

Mostly cloudy with a chance of Showers and Thunderstorms this Evening, then partly cloudy with a slight chance of Showers and Thunderstorms after midnight. Some Thunderstorms may be severe with damaging Winds this evening. Lows in the upper 60s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

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Delaware River - Port Penn Temperature Statistics

June Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 2 June, 2026

    47.6 °F

  • Average June

    69.2 °F

  • Highest 4 June, 2026

    90 °F

Climate (2021–Present)

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

    66.6 °F
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