Duck Key Weather Forecast

    • 70
    • 80

    Chance Rain Showers

    • 71
    • 76

    Chance Rain Showers

    • 68
    • 77

    Chance Rain Showers

    • 70
    • 76

    Mostly Sunny

    • 71
    • 77

    Mostly Cloudy

    • 71
    • 77

    Slight Chance Rain Showers

Today 8 Dec Monroe Middle Keys

Partly sunny becoming mostly cloudy with a chance of Showers and a slight chance of Thunderstorms. Highs in the lower 80s. Southwest to west Winds 5 to 10 Mph, becoming west to northwest near 10 Mph. Chance of rain 50 percent.

Tonight 8 Dec Monroe Middle Keys

Mostly cloudy with a chance of Showers. Lows near 70. Northwest to north Winds near 10 Mph, becoming north to northeast 10 to 15 Mph. Chance of rain 40 percent.

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Duck Key Temperature Statistics

December Temperature

The Florida Keys - Marathon International Airport (8.7 miles)

  • Lowest 5 December, 2025

    73 °F

  • Average December

    78.4 °F

  • Highest 1 December, 2025

    82 °F

Climate (2020–Present)

The Florida Keys - Marathon International Airport (8.7 miles)

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  • Average Low 2020–2025

    75.3 °F

  • Average 2020–2025

    80 °F

  • Average High 2020–2025

    85.1 °F
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