Colwyn Weather Forecast

    • 62
    • 83

    Becoming Sunny

    • 62
    • 87

    Mostly Sunny

    • 60
    • 76

    Partly Sunny

    • 59
    • 74

    Partly Sunny

    • 62
    • 80

    Partly Sunny

    • 65
    • 83

    Partly Sunny

Today 18 Sep Delaware

Patchy fog this morning. Mostly sunny. Warmer with Highs in the lower 80s. Northwest Winds around 5 Mph.

Tonight 18 Sep Delaware

Mostly clear. Lows in the lower 60s. West Winds around 5 Mph.

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Colwyn Temperature Statistics

September Temperature

Philadelphia, Philadelphia International Airport (2.5 miles)

  • Lowest 8 September, 2025

    57 °F

  • Average September

    71.8 °F

  • Highest 6 September, 2025

    90 °F

Climate (2020–Present)

Philadelphia, Philadelphia International Airport (2.5 miles)

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  • Average Low 2020–2025

    50.3 °F

  • Average 2020–2025

    58.4 °F

  • Average High 2020–2025

    67 °F
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