Key Biscayne Weather Forecast

    • 73
    • 78

    Partly Sunny

    • 72
    • 78

    Mostly Sunny

    • 69
    • 79

    Partly Sunny

    • 69
    • 78

    Mostly Sunny

    • 69
    • 78

    Mostly Sunny

    • 67
    • 79

    Partly Sunny

    • 60
    • 78

    Partly Sunny

Today 23 Dec Coastal Miami Dade County

Mostly sunny with a 20 percent chance of Showers. Highs in the upper 70s. East Winds 15 to 20 Mph.

Tonight 23 Dec Coastal Miami Dade County

Partly cloudy. Lows in the upper 60s. Northeast Winds 10 to 15 Mph.

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Key Biscayne Temperature Statistics

December Temperature

Miami, Miami International Airport (11.2 miles)

  • Lowest 11 December, 2025

    59 °F

  • Average December

    74.6 °F

  • Highest 8 December, 2025

    86 °F

Climate (2020–Present)

Miami, Miami International Airport (11.2 miles)

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  • Average Low 2020–2025

    72.6 °F

  • Average 2020–2025

    78.6 °F

  • Average High 2020–2025

    85.5 °F
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