Big Spanish Channel - Mayo Key Weather Forecast

    • 57
    • 64

    Mostly Sunny

    • 60
    • 67

    Mostly Sunny

    • 64
    • 70

    Mostly Sunny

    • 67
    • 75

    Mostly Sunny

    • 67
    • 76

    Mostly Sunny

    • 66
    • 77

    Mostly Sunny

Today 31 Dec Monroe Lower Keys

Mostly sunny. Breezy in the morning. Highs in the mid 60s. North Winds 15 to 20 Mph in the Morning, becoming northwest to north near 15 Mph.

Tonight 31 Dec Monroe Lower Keys

Partly cloudy. Lows in the mid to upper 50s. Northwest to north Winds near 15 Mph, decreasing to 10 to 15 Mph.

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Big Spanish Channel - Mayo Key Temperature Statistics

December Temperature

The Florida Keys - Marathon International Airport (19.3 miles)

  • Lowest 11 December, 2025

    66.9 °F

  • Average December

    75.1 °F

  • Highest 1 December, 2025

    82 °F

Climate (2020–Present)

The Florida Keys - Marathon International Airport (19.3 miles)

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  • Average Low 2020–2025

    75.4 °F

  • Average 2020–2025

    80 °F

  • Average High 2020–2025

    85.1 °F
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