Delaware River - Marcus Hook Weather Forecast

    • 70
    • 89

    Partly Sunny

    • 63
    • 83

    Mostly Sunny

    • 65
    • 83

    Mostly Sunny

    • 68
    • 84

    Partly Sunny

    • 74
    • 89

    Mostly Sunny

    • 77
    • 95

    Slight Chance Thunderstorms

    • 76
    • 94

    Chance Thunderstorms

Today 20 Jul Delaware

Mostly cloudy this Morning, then becoming partly sunny. Patchy fog this morning. A chance of Showers. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Hot with Highs in the upper 80s. South Winds around 5 Mph, becoming west this afternoon. Chance of rain 40 percent.

Tonight 20 Jul Delaware

Partly cloudy. A chance of Showers and Thunderstorms this evening. Lows in the upper 60s. Northwest Winds 5 to 10 Mph. Chance of rain 40 percent.

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Delaware River - Marcus Hook Temperature Statistics

July Temperature

Philadelphia, Philadelphia International Airport (10.6 miles)

  • Lowest 5 July, 2025

    66.7 °F

  • Average July

    81.1 °F

  • Highest 8 July, 2025

    96.7 °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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