Delaware River - Port Penn Weather Forecast

    • 69
    • 74

    Rain Showers Likely

    • 67
    • 83

    Chance Thunderstorms

    • 66
    • 84

    Partly Sunny

    • 71
    • 87

    Mostly Sunny

    • 77
    • 96

    Hot

    • 79
    • 101

    Hot

    • 77
    • 102

    Chance Rain Showers

Today 27 Jun New Castle

Showers likely with a chance of Thunderstorms. Near steady temperature in the upper 70s. Southeast Winds around 5 Mph. Chance of rain 70 percent.

Tonight 27 Jun New Castle

Mostly cloudy. Showers likely with a slight chance of Thunderstorms this Evening, then a chance of Showers after midnight. Lows in the upper 60s. East Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Real-Time

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

    74.1 °F

  • Highest 12 June, 2026

    97.6 °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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