Big Spanish Channel - Mayo Key Weather Forecast

    • 82
    • 89

    Chance Rain Showers

    • 79
    • 90

    Chance Rain Showers

    • 78
    • 87

    Rain Showers

    • 76
    • 86

    Rain Showers

    • 75
    • 86

    Rain Showers Likely

    • 75
    • 86

    Chance Thunderstorms

Today 15 Oct Monroe Lower Keys

Mostly sunny to partly cloudy. A slight chance of Showers and Thunderstorms. Highs in the upper 80s. East Winds 10 to 15 Mph. Chance of rain 20 percent.

Tonight 15 Oct Monroe Lower Keys

Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Lows in the lower 80s. East Winds near 15 Mph, becoming east to southeast. Chance of rain 40 percent.

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  • Temperature Real-Time

Big Spanish Channel - Mayo Key Temperature Statistics

October Temperature

The Florida Keys - Marathon International Airport (19.3 miles)

  • Lowest 1 October, 2026

    76.6 °F

  • Average October

    84.9 °F

  • Highest 11 October, 2026

    89.7 °F

Climate (2021–2026)

The Florida Keys - Marathon International Airport (19.3 miles)

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  • Average Low 2021–2026

    75.5 °F

  • Average 2021–2026

    80.2 °F

  • Average High 2021–2026

    85.1 °F
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