Colwyn Weather Forecast

    • 25
    • 46

    Mostly Sunny

    • 30
    • 39

    Mostly Cloudy

    • 35
    • 47

    Chance Rain

    • 33
    • 45

    Mostly Cloudy

    • 39
    • 46

    Chance Rain

    • 37
    • 55

    Slight Chance Rain

Today 21 Dec Delaware

Mostly sunny. Highs in the mid 40s. Temperature falling into the upper 30s in the afternoon. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 21 Dec Delaware

Mostly clear. Cold with Lows in the lower 20s. Northwest Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening.

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Colwyn Temperature Statistics

December Temperature

Philadelphia, Philadelphia International Airport (2.5 miles)

  • Lowest 9 December, 2025

    18 °F

  • Average December

    34.2 °F

  • Highest 18 December, 2025

    55.9 °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

    66.9 °F
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