Delaware River - Port Penn Weather Forecast

    • 64
    • 84

    Mostly Sunny

    • 69
    • 84

    Chance Rain Showers

    • 72
    • 86

    Rain Showers

    • 64
    • 85

    Rain Showers Likely

    • 63
    • 82

    Mostly Sunny

    • 65
    • 85

    Partly Sunny

Today 19 Jul New Castle

Patchy fog this morning. Mostly sunny. Highs in the mid 80s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 19 Jul New Castle

Mostly clear. Lows in the lower 60s. North Winds 5 to 10 Mph.

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Delaware River - Port Penn Temperature Statistics

July Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 13 July, 2026

    63.6 °F

  • Average July

    81.4 °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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