Delaware River - Marcus Hook Weather Forecast

    • 71
    • 85

    Becoming Sunny

    • 63
    • 87

    Rain Showers

    • 56
    • 74

    Partly Sunny

    • 55
    • 74

    Mostly Sunny

    • 56
    • 75

    Partly Sunny

    • 57
    • 73

    Partly Sunny

Today 5 Sep Delaware

Patchy fog this morning. Mostly sunny. Hot with Highs in the mid 80s. Southwest Winds 5 to 10 Mph.

Tonight 5 Sep Delaware

Mostly clear. Patchy fog after midnight. Humid with Lows in the upper 60s. South Winds 5 to 10 Mph.

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Delaware River - Marcus Hook Temperature Statistics

September Temperature

Philadelphia, Philadelphia International Airport (10.6 miles)

  • Lowest 2 September, 2025

    61 °F

  • Average September

    70.5 °F

  • Highest 1 September, 2025

    81 °F

Climate (2020–Present)

Philadelphia, Philadelphia International Airport (10.6 miles)

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  • Average Low 2020–2025

    50.3 °F

  • Average 2020–2025

    58.4 °F

  • Average High 2020–2025

    66.9 °F
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