Round Key Weather Forecast

    • 67
    • 78

    Increasing Clouds

    • 67
    • 78

    Mostly Sunny

    • 64
    • 77

    Mostly Sunny

    • 63
    • 77

    Sunny

    • 63
    • 76

    Mostly Sunny

    • 62
    • 76

    Mostly Sunny

Today 21 Dec Coastal Collier County

Areas of fog this morning. Mostly sunny. Highs in the lower 80s. Northeast Winds around 5 Mph, becoming northwest around 5 Mph this afternoon.

Tonight 21 Dec Coastal Collier County

Partly cloudy. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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Round Key Temperature Statistics

December Temperature

Naples, Naples Municipal Airport (26.1 miles)

  • Lowest 12 December, 2025

    55 °F

  • Average December

    71.2 °F

  • Highest 1 December, 2025

    84.9 °F

Climate (2020–Present)

Naples, Naples Municipal Airport (26.1 miles)

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  • Average Low 2020–2025

    69.3 °F

  • Average 2020–2025

    76.9 °F

  • Average High 2020–2025

    85.1 °F
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